{"title":"Battery DIY Kits","description":"\u003cp\u003eShop battery DIY kits and battery-building components in one place. Find kits, holders, busbars, nickel, copper, connectors, BMS options, and related accessories for custom battery pack projects.\u003c\/p\u003e","products":[{"product_id":"6s2p-21700-battery-kit-copper-nickel-sandwich-with-custom-lightweight-tray","title":"6S2P 21700 Battery Kit – Copper\/Nickel Sandwich with Custom Lightweight Tray","description":"\u003cp\u003eThis 6S2P battery kit is designed for serious performance in RC applications, especially lightweight RC airplanes. It includes \u003cstrong\u003eprecision laser-cut copper busbars\u003c\/strong\u003e designed for high-current battery builds.\u003c\/p\u003e\n\n\u003cp\u003eEach copper part is \u003cstrong\u003elaser cut for precision and consistency\u003c\/strong\u003e, helping you achieve a cleaner fit, better alignment, and a more professional final result during assembly.\u003c\/p\u003e\n\n\u003cp\u003eInstead of traditional nickel strip, this kit includes \u003cstrong\u003e0.2mm stainless steel welding circles\u003c\/strong\u003e. These are intended to be placed between the copper busbar and the cell terminal, making the busbar \u003cstrong\u003emuch easier to weld\u003c\/strong\u003e while still allowing you to build a strong high-current pack.\u003c\/p\u003e\n\n\u003cp\u003eThe kit also includes the \u003cstrong\u003ecustom lightweight battery trays\u003c\/strong\u003e for this configuration, along with the \u003cstrong\u003e6S JST balance cable with 7 pins\u003c\/strong\u003e, making it easier to build a reliable and compact high-performance battery pack.\u003c\/p\u003e\n\n\u003cp\u003eJust \u003cstrong\u003eadd the 21700 cells of your choice\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eRecommended cells by variant:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e0.2mm copper standard kit:\u003c\/strong\u003e EVE 40PL, Ampace JP40, and other similar high-discharge cells\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e0.3mm copper variant:\u003c\/strong\u003e TENPOWER 50XG, Ampace JP50P1, EVE 50PL, Reliance RS50, and other similar high-discharge cells\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e⚠️ \u003cstrong\u003eImportant:\u003c\/strong\u003e This kit is \u003cstrong\u003enot pre-welded\u003c\/strong\u003e. All parts must be assembled and welded by the builder. A capable spot welder is required. The standard kit includes \u003cstrong\u003e0.2mm copper with 12 AWG cable\u003c\/strong\u003e, while the upgraded variant includes \u003cstrong\u003e0.3mm copper with 10 AWG cable\u003c\/strong\u003e and requires even more welding power.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003ePlease make sure your spot welder is capable of welding 0.2mm or 0.3mm copper\u003c\/strong\u003e, depending on the variant you choose. If you have any questions or need orientation before purchasing, feel free to contact us.\u003c\/p\u003e\n\n\u003cp\u003eWe also offer the full line of \u003cstrong\u003eAWithZ spot welders\u003c\/strong\u003e, one of the best spot welder brands currently available on the market. Feel free to take a look at our selection here:\u003cbr\u003e\n\u003ca href=\"https:\/\/diy500amp.com\/collections\/awithz-spot-welders\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eView our AWithZ Spot Welders collection\u003c\/a\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat’s Included:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePrecision laser-cut copper busbars for 6S2P configuration\u003c\/li\u003e\n  \u003cli\u003e0.2mm stainless steel welding circles\u003c\/li\u003e\n  \u003cli\u003eCustom lightweight battery trays\u003c\/li\u003e\n  \u003cli\u003e1 x 6S JST balance cable with 7 pins\u003c\/li\u003e\n  \u003cli\u003eReference photos for guidance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eVariant Options:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandard Kit:\u003c\/strong\u003e 0.2mm copper busbars, includes 12 AWG cable\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e0.3mm Copper Variant:\u003c\/strong\u003e 0.3mm copper busbars, includes 10 AWG cable\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCell Configuration: 6S2P (12 cells total)\u003c\/li\u003e\n  \u003cli\u003eAssembly Type: DIY kit, welding required\u003c\/li\u003e\n  \u003cli\u003eBusbar Material: Precision laser-cut copper\u003c\/li\u003e\n  \u003cli\u003eWelding Aid Material: 0.2mm stainless steel circles\u003c\/li\u003e\n  \u003cli\u003eCurrent Capability: Depends on cell choice, weld quality, cable selection, and overall build quality\u003c\/li\u003e\n  \u003cli\u003eIdeal Use: RC airplanes, high-drain DIY battery packs\u003c\/li\u003e\n  \u003cli\u003eSpot Welder Required: Yes, must be capable of welding copper busbars using stainless steel welding circles\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DIY500AMP.COM","offers":[{"title":"2S \/ 0.2mm with 12 AWG Cables","offer_id":42718133420103,"sku":null,"price":37.99,"currency_code":"USD","in_stock":true},{"title":"2S \/ 0.3mm with 10 AWG Cables","offer_id":42718133452871,"sku":null,"price":43.99,"currency_code":"USD","in_stock":true},{"title":"3S \/ 0.2mm with 12 AWG Cables","offer_id":42718133485639,"sku":null,"price":41.99,"currency_code":"USD","in_stock":true},{"title":"3S \/ 0.3mm with 10 AWG Cables","offer_id":42718133518407,"sku":null,"price":52.99,"currency_code":"USD","in_stock":true},{"title":"4S \/ 0.2mm with 12 AWG Cables","offer_id":42718133551175,"sku":null,"price":45.99,"currency_code":"USD","in_stock":true},{"title":"4S \/ 0.3mm with 10 AWG Cables","offer_id":42718133583943,"sku":null,"price":53.99,"currency_code":"USD","in_stock":true},{"title":"5S \/ 0.2mm with 12 AWG Cables","offer_id":42718133616711,"sku":null,"price":55.99,"currency_code":"USD","in_stock":true},{"title":"5S \/ 0.3mm with 10 AWG Cables","offer_id":42718133649479,"sku":null,"price":65.99,"currency_code":"USD","in_stock":true},{"title":"6S \/ 0.2mm with 12 AWG Cables","offer_id":42656040026183,"sku":null,"price":56.99,"currency_code":"USD","in_stock":true},{"title":"6S \/ 0.3mm with 10 AWG Cables","offer_id":42656040058951,"sku":null,"price":69.99,"currency_code":"USD","in_stock":true},{"title":"7S \/ 0.2mm with 12 AWG Cables","offer_id":42656040386631,"sku":null,"price":57.99,"currency_code":"USD","in_stock":true},{"title":"7S \/ 0.3mm with 10 AWG Cables","offer_id":42656040452167,"sku":null,"price":72.99,"currency_code":"USD","in_stock":true},{"title":"8S \/ 0.2mm with 12 AWG Cables","offer_id":42656040419399,"sku":null,"price":61.99,"currency_code":"USD","in_stock":true},{"title":"8S \/ 0.3mm with 10 AWG Cables","offer_id":42656040484935,"sku":null,"price":76.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0588\/8055\/7127\/files\/1_3b20c74a-6761-4135-9a58-352bc318b986.jpg?v=1744991530"},{"product_id":"milwaukee-m18-18v-6ah-battery-case-pcb-kit-no-cells-included","title":"Milwaukee M18 18V 6Ah Battery Case \u0026 PCB Kit (No Cells Included)","description":"\u003ch2 data-end=\"255\" data-start=\"168\"\u003e\u003cstrong data-end=\"255\" data-start=\"171\"\u003eDIY500AMP.COM – Milwaukee M18 18V 6Ah Battery Case \u0026amp; PCB Kit (No Cells Included)\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp data-end=\"575\" data-start=\"257\"\u003e\u003cstrong data-end=\"279\" data-start=\"257\"\u003eRead Before Buying\u003c\/strong\u003e\u003cbr data-end=\"282\" data-start=\"279\"\u003eAt DIY500AMP.COM, we provide high-quality components for serious battery builders. This kit is made for users who already understand lithium-ion battery safety and have experience with spot welding and pack assembly. If you are new to battery building, this is not a beginner-friendly product.\u003c\/p\u003e\n\u003chr data-end=\"580\" data-start=\"577\"\u003e\n\u003ch3 data-end=\"602\" data-start=\"582\"\u003e\u003cstrong data-end=\"602\" data-start=\"586\"\u003eWhat You Get\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-end=\"798\" data-start=\"603\"\u003eA complete Milwaukee-style M18 18V 6Ah plastic housing with a matching PCB\/BMS protection board. You will need ten 18650 high-power lithium cells to complete your build. Cells are not included.\u003c\/p\u003e\n\u003cp data-end=\"862\" data-start=\"800\"\u003eThe included PCB is designed with important safety features:\u003c\/p\u003e\n\u003col data-end=\"1402\" data-start=\"864\"\u003e\n\u003cli data-end=\"968\" data-start=\"864\"\u003e\n\u003cp data-end=\"968\" data-start=\"867\"\u003eBattery level lock on first power-up until the pack goes through a full charge and discharge cycle.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1043\" data-start=\"969\"\u003e\n\u003cp data-end=\"1043\" data-start=\"972\"\u003eCharging indicator: red light means charging, green light means full.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1124\" data-start=\"1044\"\u003e\n\u003cp data-end=\"1124\" data-start=\"1047\"\u003eOvercharge protection that stops charging when voltage limits are exceeded.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1209\" data-start=\"1125\"\u003e\n\u003cp data-end=\"1209\" data-start=\"1128\"\u003eOvercharge recovery that resumes charging once voltage is back in a safe range.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1280\" data-start=\"1210\"\u003e\n\u003cp data-end=\"1280\" data-start=\"1213\"\u003eOver-discharge protection that cuts output if voltage is too low.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1402\" data-start=\"1281\"\u003e\n\u003cp data-end=\"1402\" data-start=\"1284\"\u003eOver-temperature protection during both charging and discharging, with automatic recovery when temperatures normalize.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003chr data-end=\"1407\" data-start=\"1404\"\u003e\n\u003ch3 data-end=\"1456\" data-start=\"1409\"\u003e\u003cstrong data-end=\"1456\" data-start=\"1413\"\u003eAssembly Tips from Nelvick at DIY500AMP\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul data-end=\"2106\" data-start=\"1457\"\u003e\n\u003cli data-end=\"1556\" data-start=\"1457\"\u003e\n\u003cp data-end=\"1556\" data-start=\"1459\"\u003eUse only matched and balanced 18650 cells. All cells must have the same voltage before welding.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1744\" data-start=\"1557\"\u003e\n\u003cp data-end=\"1744\" data-start=\"1559\"\u003eRecommended cells include EVE 25P, EVE 30P, Samsung 25R, Sony VTC5D, and the best option is \u003cstrong data-end=\"1641\" data-start=\"1626\"\u003eAmpace JP30\u003c\/strong\u003e. This kit is a perfect match for Ampace JP30 cells, giving you excellent performance and durability.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1833\" data-start=\"1745\"\u003e\n\u003cp data-end=\"1833\" data-start=\"1747\"\u003eMake clean and correct welds. A reversed connection will instantly damage the board.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1894\" data-start=\"1834\"\u003e\n\u003cp data-end=\"1894\" data-start=\"1836\"\u003ePrevent the PCB from touching battery surfaces directly.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1971\" data-start=\"1895\"\u003e\n\u003cp data-end=\"1971\" data-start=\"1897\"\u003eWork on a clean and dry surface while following anti-static precautions.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2106\" data-start=\"1972\"\u003e\n\u003cp data-end=\"2106\" data-start=\"1974\"\u003ePCB and LED colors may vary depending on inventory. Colors may include blue, green, red, or white. Performance is always guaranteed.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"2111\" data-start=\"2108\"\u003e\n\u003ch3 data-end=\"2137\" data-start=\"2113\"\u003e\u003cstrong data-end=\"2137\" data-start=\"2117\"\u003eBefore You Start\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-end=\"2167\" data-start=\"2138\"\u003eIf you are using new cells:\u003c\/p\u003e\n\u003cul data-end=\"2279\" data-start=\"2168\"\u003e\n\u003cli data-end=\"2221\" data-start=\"2168\"\u003e\n\u003cp data-end=\"2221\" data-start=\"2170\"\u003eChoose only genuine high-drain 18650 power cells.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2279\" data-start=\"2222\"\u003e\n\u003cp data-end=\"2279\" data-start=\"2224\"\u003eBalance all cells to the same voltage before welding.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"2321\" data-start=\"2281\"\u003eIf you are repairing an existing pack:\u003c\/p\u003e\n\u003cul data-end=\"2386\" data-start=\"2322\"\u003e\n\u003cli data-end=\"2386\" data-start=\"2322\"\u003e\n\u003cp data-end=\"2386\" data-start=\"2324\"\u003eTest each cell and make sure voltages match before assembly.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"2482\" data-start=\"2388\"\u003eTip: If the pack does not output voltage after assembly, activate it with a dedicated charger.\u003c\/p\u003e\n\u003chr data-end=\"2487\" data-start=\"2484\"\u003e\n\u003ch3 data-end=\"2513\" data-start=\"2489\"\u003e\u003cstrong data-end=\"2513\" data-start=\"2493\"\u003ePackage Includes\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul data-end=\"2666\" data-start=\"2514\"\u003e\n\u003cli data-end=\"2547\" data-start=\"2514\"\u003e\n\u003cp data-end=\"2547\" data-start=\"2516\"\u003eOne M18-style plastic housing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2591\" data-start=\"2548\"\u003e\n\u003cp data-end=\"2591\" data-start=\"2550\"\u003eOne PCB with integrated BMS protections\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2638\" data-start=\"2592\"\u003e\n\u003cp data-end=\"2638\" data-start=\"2594\"\u003eHousing components shown in product photos\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2666\" data-start=\"2639\"\u003e\n\u003cp data-end=\"2666\" data-start=\"2641\"\u003eNo battery cells included\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"2671\" data-start=\"2668\"\u003e\n\u003cp data-end=\"2873\" data-start=\"2673\"\u003e\u003cstrong data-end=\"2693\" data-start=\"2673\"\u003eDIY500AMP Policy\u003c\/strong\u003e\u003cbr data-end=\"2696\" data-start=\"2693\"\u003ePurchasing this item means you accept that PCB and LED colors or design details may vary. These differences do not affect performance and are not a reason for return or dispute.\u003c\/p\u003e\n\u003chr data-end=\"2878\" data-start=\"2875\"\u003e\n\u003cp data-end=\"3097\" data-start=\"2880\"\u003e\u003cstrong data-end=\"2899\" data-start=\"2880\"\u003eSafety Reminder\u003c\/strong\u003e\u003cbr data-end=\"2902\" data-start=\"2899\"\u003eBattery building requires skill and proper tools. If you are unsure of your abilities, work with someone experienced. Improper assembly can cause damage to the PCB, cells, or create safety risks.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv class=\"title--wrap--NWOaiSp description--title--NMh4UiD\"\u003e\n\u003cdiv class=\"title--text--Otu0bLr\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"extend--wrap--yXwoDbO\"\u003e\n\u003cdiv class=\"extend--content--VuIQZia\"\u003e\n\u003cdiv\u003e\n\u003cdiv data-pl=\"product-description\" class=\"description--product-description--Mjtql28\" data-spm=\"1000023\" id=\"product-description\"\u003e\n\u003cdiv class=\"description--origin-part--rWy05pE\"\u003e\n\u003cp data-spm-anchor-id=\"a2g0o.detail.1000023.i0.37c0N40NN40NJj\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S4626d7310e164e529aa7d7c7c3e4b131V.jpg\"\u003e\u003cbr\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S7cf9ae5497a14a11892133738240277cn.jpg?width=800\u0026amp;height=800\u0026amp;hash=1600\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/Se6b3f6b8734345ad90ae2f933cfc0d73h.jpg?width=800\u0026amp;height=800\u0026amp;hash=1600\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S94681fc0eb084077a27666d04e58cf96d.jpg?width=800\u0026amp;height=800\u0026amp;hash=1600\"\u003e\u003cbr\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S491e75fcd2a04f70a22eb3cdd78559dfS.jpg\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S2b9ceffdaee44593a5d0f2234b48e266R.jpg\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIt can fill \u003c\/span\u003e\u003cspan\u003e10 pieces of 18650\u003c\/span\u003e\u003cspan\u003e power Li-ion batteries, But this is plastic shell, there is no battery inside.\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv align=\"start\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv align=\"start\"\u003e\u003cspan\u003ePlease be kindly noted:\u003c\/span\u003e\u003c\/div\u003e\n\u003cp align=\"left\"\u003e\u003cspan\u003e1. PCB Color: Blue, or white, or Green, or Red, etc. any color, PCB color and version number are different according to the actual latest inventory. \u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv align=\"start\"\u003e\u003cspan\u003e2. PCB design may change due to changes with the supply chain and processing technology. \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv align=\"start\"\u003e\u003cspan\u003e3. LED Color: red, or green, or blue.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv align=\"start\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv align=\"start\"\u003e\u003cspan\u003eIf you have any objection to the following items, please do not order ! \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv align=\"start\"\u003e\n\u003cspan\u003e1. \u003c\/span\u003e\u003cspan\u003ePCB color and Led color may be any color according to our stock, \u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv align=\"start\"\u003e\n\u003cspan\u003e2. PCB design may change \u003c\/span\u003e\u003cspan\u003ewith the same function and performance guaranteed\u003c\/span\u003e\u003cspan\u003e .\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv align=\"start\"\u003e\n\u003cspan\u003eOnce you place an order, you agree to the above two terms by default, and you are not allowed to submit disputes for the reasons of \"different colors, design changes, wrong version of goods\" and so on.\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e\u003cbr\u003ePreparation before assembly:\u003cbr\u003e(1). If a new core is used, please note:\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003e        a. 18650 \u003c\/span\u003e\u003cspan\u003epower \u003c\/span\u003e\u003cspan\u003elithium battery core must be selected,\u003cbr\u003e        b. A group of 5\/10 cores must be equipped with resistance and capacitance to make their voltage the same.\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e(2). If the old battery is repaired, please test the voltage at both ends of each cell. If the voltage is different, please charge each cell to the same voltage value.\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eVery important:\u003cbr\u003eEnsure that the voltage of each cell is the same before welding PCB.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003e\u003cstrong\u003ePackaging includes:\u003c\/strong\u003e\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003eAs shown in the following figure: (\u003c\/span\u003e\u003cspan\u003eNo Battery !!! No cell !!!\u003c\/span\u003e\u003cspan\u003e)\u003c\/span\u003e\u003cbr\u003e\u003cimg data-spm-anchor-id=\"a2g0o.detail.1000023.i1.37c0N40NN40NJj\" src=\"https:\/\/ae01.alicdn.com\/kf\/S9788521ac4dc42c0a35dbaf443a7bd3cW.jpg?width=800\u0026amp;height=800\u0026amp;hash=1600\"\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"DIY500AMP.COM","offers":[{"title":"18650 6Ah","offer_id":42611780943943,"sku":null,"price":16.95,"currency_code":"USD","in_stock":true},{"title":"21700 10Ah","offer_id":42611780911175,"sku":null,"price":19.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0588\/8055\/7127\/files\/M18-Kit-1.jpg?v=1754612894"},{"product_id":"21700-plastic-case-bms-pcba-for-makita-18v-li-ion-battery-diy-kit","title":"21700 Plastic Case + BMS PCBA for Makita 18V Li-ion Battery (DIY Kit)","description":"\u003cdiv style=\"font-family: Arial, sans-serif; line-height: 1.5;\"\u003e\n\u003ch2\u003e21700 Plastic Case + BMS PCBA for Makita 18V Li-ion Battery (DIY Kit)\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDIY Semi-Manufactured Battery Enclosure with Integrated BMS\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis product is a \u003cstrong\u003e21700 battery shell with integrated BMS PCBA\u003c\/strong\u003e, designed for building a Makita 18V compatible lithium-ion battery pack. It is intended for experienced DIY builders who understand lithium-ion battery assembly and safety procedures.\u003c\/p\u003e\n\u003cdiv style=\"padding: 12px; border: 1px solid #ddd; border-radius: 10px; margin: 14px 0;\"\u003e\n\u003cp style=\"margin: 0;\"\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e This product includes the \u003cstrong\u003eplastic case and PCB only\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003eNo battery cells included.\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThis enclosure allows you to build a \u003cstrong\u003e10-cell 21700 lithium-ion battery pack\u003c\/strong\u003e configuration. The integrated BMS includes balanced charging functionality and multiple protection features to help ensure safe operation and extend pack lifespan.\u003c\/p\u003e\n\u003ch3\u003eBMS Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBuilt-in IC for individual cell voltage detection\u003c\/li\u003e\n\u003cli\u003eBalanced charging function\u003c\/li\u003e\n\u003cli\u003eOvercharge protection\u003c\/li\u003e\n\u003cli\u003eOver-discharge protection\u003c\/li\u003e\n\u003cli\u003eOvercurrent protection\u003c\/li\u003e\n\u003cli\u003eOvervoltage protection\u003c\/li\u003e\n\u003cli\u003eOverheat protection\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe balancing function helps keep each cell at a consistent voltage level, improving pack efficiency and supporting longer service life.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned for \u003cstrong\u003e10\u003c\/strong\u003e pieces of \u003cstrong\u003e21700\u003c\/strong\u003e lithium-ion cells\u003c\/li\u003e\n\u003cli\u003eCompatible with \u003cstrong\u003eMakita 18V\u003c\/strong\u003e platform (aftermarket \/ DIY use)\u003c\/li\u003e\n\u003cli\u003eIntegrated BMS PCBA\u003c\/li\u003e\n\u003cli\u003eLED indicator included\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"padding: 12px; background: #f7f7f7; border: 1px solid #e6e6e6; border-radius: 10px; margin: 14px 0;\"\u003e\n\u003cp style=\"margin: 0;\"\u003e\u003cstrong\u003eBatch \/ Inventory Notice:\u003c\/strong\u003e\u003cbr\u003ePCB color may vary (blue, white, green, red, etc.). LED color may vary (red, green, or blue).\u003cbr\u003ePCB design, version, and labeling may change between batches while maintaining the same function and performance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3\u003eRequirements Before Purchase\u003c\/h3\u003e\n\u003cp\u003eThis is a DIY battery assembly component. To use this product properly, you must have:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e21700 high-drain lithium-ion cells\u003c\/li\u003e\n\u003cli\u003eSpot welder\u003c\/li\u003e\n\u003cli\u003eSoldering tools\u003c\/li\u003e\n\u003cli\u003eMultimeter\u003c\/li\u003e\n\u003cli\u003eProper lithium-ion charger\u003c\/li\u003e\n\u003cli\u003eBattery pack building knowledge and experience\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"padding: 12px; border-left: 6px solid #d9534f; background: #fff5f5; border-radius: 10px; margin: 14px 0;\"\u003e\n\u003cp style=\"margin: 0;\"\u003e\u003cstrong\u003eVery Important:\u003c\/strong\u003e Ensure that the voltage of each 21700 cell is the \u003cstrong\u003ethe same\u003c\/strong\u003e before welding the PCB.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWhat’s Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1x Plastic battery case\u003c\/li\u003e\n\u003cli\u003e1x Integrated BMS PCB\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"padding: 12px; border: 1px solid #ddd; border-radius: 10px; margin: 14px 0;\"\u003e\n\u003cp style=\"margin: 0;\"\u003e\u003cstrong\u003eNot Included:\u003c\/strong\u003e Battery cells, charger, tools, or any other accessories.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3\u003eAdvance Notice (Read Carefully)\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eProduct images are for reference only. Actual size\/color may vary slightly.\u003c\/li\u003e\n\u003cli\u003ePCB label may not match the photo and may change by batch.\u003c\/li\u003e\n\u003cli\u003eIf you have objections to color differences, label differences, or PCB design changes, please do not purchase.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eImportant Disclaimer\u003c\/h3\u003e\n\u003cp\u003eThis is \u003cstrong\u003enot an original Makita product\u003c\/strong\u003e. This is an aftermarket DIY component.\u003cbr\u003e\u003cstrong\u003eNo battery cells included.\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr style=\"margin: 20px 0;\"\u003e\n\u003ch3\u003eSafety Warning for Lithium-Ion Battery Usage\u003c\/h3\u003e\n\u003cp\u003eCustomers should have a clear understanding of lithium-ion battery handling and safety before making a purchase. Lithium-ion batteries are highly sensitive and may pose fire, burn, or explosion risks if improperly handled. Always charge batteries on fire-resistant surfaces, and never leave them charging unattended.\u003c\/p\u003e\n\u003cp\u003eBy purchasing, you assume full responsibility for any injury, damage, or loss arising from the incorrect use or handling of lithium-ion batteries or chargers. Compatibility with specific devices is not guaranteed. Only charge using a smart charger designed specifically for this battery type, and do not mix old or used batteries with new ones.\u003c\/p\u003e\n\u003ch4\u003eImportant Usage Guidelines:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot for Use in E-Cigarettes or Similar Devices:\u003c\/strong\u003e Lithium-ion batteries present a serious risk of injury, property damage, or even death if improperly used.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRisk of Fire and Explosion:\u003c\/strong\u003e Misuse can cause batteries to ignite, explode, or release harmful gases.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlways Use in a Protected Pack:\u003c\/strong\u003e Ensure batteries are used within intended specifications and supported by appropriate circuitry.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProper Storage and Handling:\u003c\/strong\u003e Store batteries in protective cases, away from metal items to prevent short circuits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInspection Prior to Use:\u003c\/strong\u003e Do not use batteries with damaged wrappers, torn insulators, or visible damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFollow Manufacturer's Charging Specifications:\u003c\/strong\u003e Avoid overcharging or over-discharging, and never alter, dismantle, puncture, crush, or burn.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeat and Water Precautions:\u003c\/strong\u003e Do not expose batteries to high temperatures or any liquids.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAssembly Guidelines:\u003c\/strong\u003e Batteries should only be spot welded; do not solder directly onto battery terminals.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eUsers are expected to have battery-handling knowledge before purchasing. By using these batteries, you acknowledge that usage is solely at your own risk, and you take full responsibility for any resulting consequences.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFor Resellers:\u003c\/strong\u003e Please ensure all safety information is passed along to end users to promote safe handling and proper use.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Makita","offers":[{"title":"Default Title","offer_id":42450681856071,"sku":"BL1880-10S21700-BMS-SHELL","price":39.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0588\/8055\/7127\/files\/makita-18v-21700-battery-case-bms-10ah-05.jpg?v=1769909299"},{"product_id":"bl18120-15x21700-battery-case-50a-bms-for-makita-18v-diy-kit","title":"BL18120 15x21700 Battery Case + 50A BMS for Makita 18V (DIY Kit)","description":"\u003cdiv style=\"font-family: Arial, sans-serif; line-height: 1.5;\"\u003e\n\u003ch2\u003eBL18120 15x21700 Battery Case + 50A BMS for Makita 18V (DIY Kit)\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHigh-Discharge 15 Cell DIY Battery Shell with Integrated Protection PCB\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis DIY battery case is designed for building a high-capacity Makita 18V compatible battery pack using \u003cstrong\u003e15 pieces of 21700 high-discharge lithium-ion cells\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cdiv style=\"padding: 12px; border: 1px solid #ddd; border-radius: 10px; margin: 14px 0;\"\u003e\n\u003cstrong\u003eImportant:\u003c\/strong\u003e This product includes the shell and BMS PCB only. \u003cstrong\u003eNo battery cells are included.\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003ch3\u003eMain Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned for 15 pieces of 21700 lithium-ion cells\u003c\/li\u003e\n\u003cli\u003eIntegrated 50A discharge protection BMS\u003c\/li\u003e\n\u003cli\u003eHigh discharge capability for tools up to 900W\u003c\/li\u003e\n\u003cli\u003eOvercharge protection\u003c\/li\u003e\n\u003cli\u003eOver-discharge protection\u003c\/li\u003e\n\u003cli\u003eOvercurrent protection\u003c\/li\u003e\n\u003cli\u003eHigh compatibility with Makita 18V platform\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompatible With\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBL1830\u003c\/li\u003e\n\u003cli\u003eBL1850\u003c\/li\u003e\n\u003cli\u003eBL1860\u003c\/li\u003e\n\u003cli\u003eBL18120 style builds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDischarge protection rating: 50A\u003c\/li\u003e\n\u003cli\u003eDesigned for high-drain 21700 cells only\u003c\/li\u003e\n\u003cli\u003eEnsure all cells are voltage matched before assembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"padding: 12px; background: #f7f7f7; border: 1px solid #e6e6e6; border-radius: 10px; margin: 14px 0;\"\u003e\n\u003cstrong\u003ePCB Notice:\u003c\/strong\u003e\u003cbr\u003ePCB color, LED color, and labeling may vary by production batch. Functionality and performance remain the same.\u003c\/div\u003e\n\u003ch3\u003eWhat’s Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1x BL18120 style plastic battery shell\u003c\/li\u003e\n\u003cli\u003e1x Integrated 50A BMS PCB\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"padding: 12px; border-left: 6px solid #d9534f; background: #fff5f5; border-radius: 10px; margin: 14px 0;\"\u003e\n\u003cstrong\u003eImportant DIY Notice:\u003c\/strong\u003e\u003cbr\u003eThis product is intended for experienced battery builders. You must have spot welding equipment, testing tools, and proper knowledge of lithium-ion battery assembly.\u003c\/div\u003e\n\u003ch3\u003eDisclaimer\u003c\/h3\u003e\n\u003cp\u003eThis is an aftermarket DIY component. Not an original Makita product. No battery cells included.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eSafety Warning for Lithium-Ion Battery Usage\u003c\/h3\u003e\n\u003cp\u003eCustomers should have a clear understanding of lithium-ion battery handling and safety before making a purchase. Lithium-ion batteries are highly sensitive and may pose fire, burn, or explosion risks if improperly handled.\u003c\/p\u003e\n\u003cp\u003eBy purchasing, you assume full responsibility for any injury, damage, or loss arising from incorrect use or handling. Only assemble using proper tools and correct high-drain 21700 cells.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Makita","offers":[{"title":"Default Title","offer_id":42451004391495,"sku":null,"price":75.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0588\/8055\/7127\/files\/makita-bl18120-15s21700-50a-battery-shell-01.jpg?v=1769911584"}],"url":"https:\/\/diy500amp.com\/collections\/battery-diy-kits.oembed","provider":"DIY500AMP.COM","version":"1.0","type":"link"}