Ships from Florida

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High-Performance Battery Cells, Spot Welders, and DIY Battery Pack Supplies

Ships from Florida. Tested by DIY500AMP. Built for serious battery builders who care about real performance, safe assembly, and honest product guidance.

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Authentic Grade A Cells

Trusted lithium-ion cells selected for serious DIY builds.

Ships from Florida

Fast U.S. order processing from our Florida location.

Real Load Testing

Product guidance based on practical battery builder experience.

Battery Builder Support

Helpful support for cells, spot welders, strips, and pack parts.

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18650 Battery Cells
18650 Battery Cells
21700 Battery Cells
21700 Battery Cells
AWithZ Spot Welders
AWithZ Spot Welders
Electrical Insulating Adhesive Paper - 70mm (3.15in) Width, 3m Length - battery building product photo 2
Accessories
BMS (Battery Management System)
BMS (Battery Management System)
BAK 65E 21700 6500mAh 25A high-capacity lithium-ion battery cell product photo 2
BAK 65E 21700 6500mAh 25A high-capacity lithium-ion battery cell product photo 2

BAK 65E - In stock

NEW ARRIVAL - Limited quantity

Buy Now.

EVE 30PL 18650 3000mAh 60A Tabless Cell

High-power 18650 cell for demanding DIY builds.

View EVE 30PL

Tenpower 50XG 21700 5000mAh 90A Tabless Cell

High-current 21700 performance cell in stock.

View Tenpower 50XG
EVE 30PL 18650 3000mAh 60A Battery Cell - Tabless - lithium-ion battery cell photo 7
EVE 30PL 18650 3000mAh 60A Battery Cell - Tabless - lithium-ion battery cell photo 7

18650 Battery Cells

Fast U.S. shipping from Florida. Delivery in 1 to 4 days.

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Reliance 21700 RS40 4000mAh 70A Lithium-Ion Battery Tabless Cell - High Performance - lithium-ion battery cell photo 7
Reliance 21700 RS40 4000mAh 70A Lithium-Ion Battery Tabless Cell - High Performance - lithium-ion battery cell photo 7

21700 Battery Cells

High-performance 21700 cells for serious battery projects.

Shop 21700 Cells
AWithZ P90C Spot Welder – 56.8kW, 999 Gears, 0.6mm Capacity - battery building product
AWithZ P90C Spot Welder – 56.8kW, 999 Gears, 0.6mm Capacity - battery building product

AWithZ Spot Welders

Precision welders for nickel, copper sandwich, and DIY pack assembly.

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21700 Cells

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Two EVE INR21700-50PL 5000mAh lithium-ion battery cells, upright and side viewEVE 50PL 21700 5000mAh 70A Tabless Lithium-Ion Battery Cell - lithium-ion battery cell photo 2
$6.15 USD
EVE 50PL 21700 5000mAh 70A Tabless Lithium-Ion Battery CellEVE
Two Ampace 21700 A4N21 4000mAh lithium-ion battery cells, upright and side viewAmpace 21700 A4N21 4000mAh lithium-ion battery cell, upright front view
$4.45 USD
Ampace JP40 21700 4000mah 70A Battery - Tabless CellAmpace
Two Reliance RS50 21700 5000mAh 70A tabless lithium-ion battery cells, front and side viewReliance 21700 RS50 5000mAh 70A CCC Lithium-Ion Battery Tabless Cell - High Performance - lithium-ion battery cell photo 2
$6.99 USD
Reliance 21700 RS50 5000mAh 70A CCC Lithium-Ion Battery Tabless Cell - High PerformanceReliance
Two Reliance RS50 21700 5000mAh 70A tabless lithium-ion battery cells, upright and side viewReliance RS50 21700 5000mAh 70A tabless lithium-ion battery cell, angled side view
$6.25 USD
TENPOWER 50XG 21700 5000 mAh 90A Battery – Tabless CellTENPOWER
Samsung 50S 21700 5000mAh 25A Battery - lithium-ion battery cellSamsung 50S 21700 5000mAh 25A Battery - lithium-ion battery cell photo 2
$5.99 USD $7.99 USD
Samsung 50S 21700 5000mAh 25A BatterySamsung
EVE 40PL 21700 4000mAh 70A Battery - Tabless Cell - lithium-ion battery cellEVE 40PL 21700 4000mAh 70A Battery - Tabless Cell - lithium-ion battery cell photo 2
$4.45 USD $7.99 USD
EVE 40PL 21700 4000mAh 70A Battery - Tabless CellEVE
Two LG INR21700-45D 4400mAh lithium-ion battery cells, upright and side viewBAK 45D 21700 - 4500mah 60A - Premium A04 Tabless - lithium-ion battery cell photo 2
$5.75 USD $8.95 USD
BAK 45D 21700 - 4500mah 60A - Premium A04 TablessBAK
EVE INR21700 58E 5700mAh 16.8A - Battery Cell - lithium-ion battery cellEVE INR21700 58E 5700mAh 16.8A - Battery Cell - lithium-ion battery cell photo 2
$4.95 USD
EVE INR21700 58E 5700mAh 16.8A - Battery CellEVE
EVE 50E 21700 5000mAh 15A BatteryEVE 50E 21700 5000mAh 15A Battery
$3.95 USD
EVE 50E 21700 5000mAh 15A BatteryEVE
Two Amprius 21700 50Q 5000mAh tabless battery cells, upright and side viewAmprius 21700 50Q 5000mAh 60A tabless battery cell, side view
$7.99 USD
Amprius INR21700 50Q 50A Tabless Battery Cell – 5000mAh High Performance (50A)Amprius
EVE 40P 21700 4000mAh 50A BatteryEVE 40P 21700 4000mAh 50A Battery
$3.35 USD $6.99 USD
EVE 40P 21700 4000mAh 50A BatteryEVE
Linkdata 21700S-60P Battery Cell – 6000mAh 60A – High Power Cell - lithium-ion battery cellLinkdata 21700S-60P Battery Cell – 6000mAh 60A – High Power Cell - lithium-ion battery cell photo 2
$10.99 USD
Linkdata 21700S-60P Battery Cell – 6000mAh 60A – High Power CellLinkdata

18650 Cells

Two Ampace INR18650-JP30PM 3000mAh lithium-ion battery cells, upright and side viewAmpace INR18650-JP30PM 3000mAh lithium-ion battery cell, upright front view
$6.75 USD
Ampace JP30P1 18650 3000mah 56A Battery Cell - Tabless CellAmpace
Two Amprius SA110 18650 4000mAh lithium-ion battery cells, upright and side viewThree Amprius SA110 18650 4000mAh lithium-ion battery cells, terminal view
$7.99 USD
Amprius SA110 12A 18650 Battery Cell – 4000mAh Ultra High CapacityAmprius
EVE 25P 18650 Battery – 2500mAh, 20A - lithium-ion battery cellEVE 25P 18650 Battery – 2500mAh, 20A
$2.65 USD
EVE 25P 18650 Battery – 2500mAh, 20AEVE
EVE 26VA 18650 2650mAh 13A Battery - lithium-ion battery cellEVE 26VA 18650 2650mAh 13A Battery - lithium-ion battery cell photo 2
$2.35 USD $3.99 USD
EVE 26VA 18650 2650mAh 13A BatteryEVE
EVE 30P 18650 3000mAh 30A Battery Cell - lithium-ion battery cellEVE 30P 18650 3000mAh 30A Battery Cell - lithium-ion battery cell photo 2
$3.49 USD
EVE 30P 18650 3000mAh 30A Battery CellEVE
Two EVE INR18650/30PL 3000mAh lithium-ion battery cells, upright and side viewEVE 30PL 18650 3000mAh 60A Battery Cell - Tabless - lithium-ion battery cell photo 2
$6.25 USD
EVE 30PL 18650 3000mAh 60A Battery Cell - TablessEVE
EVE 33V 18650 3200mAh 10A BatteryEVE 33V 18650 3200mAh 10A Battery - lithium-ion battery cell photo 2
$2.69 USD $5.99 USD
EVE 33V 18650 3200mAh 10A BatteryEVE
EVE 35V 18650 3500mAh 10.2A BatteryEVE 35V 18650 3500mAh 10.2A Battery
$2.95 USD
EVE 35V 18650 3500mAh 10.2A BatteryEVE
Samsung 25R 18650 Cell – 2500mAh 20A Battery - lithium-ion battery cellSamsung 25R 18650 Cell – 2500mAh 20A Battery - lithium-ion battery cell photo 2
$4.50 USD
Samsung 25R 18650 Cell – 2500mAh 20A BatterySamsung
Samsung 30Q 18650 3000mAh 15A BatterySamsung 30Q 18650 3000mAh 15A Battery
$4.65 USD
Samsung 30Q 18650 3000mAh 15A BatterySamsung
Samsung 35E 18650 3500mAh 8A Battery - lithium-ion battery cellSamsung 35E 18650 3500mAh 8A Battery - lithium-ion battery cell photo 2
$4.89 USD $5.99 USD
Samsung 35E 18650 3500mAh 8A BatterySamsung
Sony | Murata VTC5D 18650 2800mAh 25A Battery - lithium-ion battery cellSony | Murata VTC5D 18650 2800mAh 25A Battery - lithium-ion battery cell photo 2
$3.15 USD $7.95 USD
Sony | Murata VTC5D 18650 2800mAh 25A BatterySony

AWithZ Spot Welders

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AWithZ UF20B Welding Pen Tips (1 Set / Pair) - battery building product
$5.95 USD
AWithZ UF20B Welding Pen Tips (1 Set / Pair)AWithZ
AWithZ WP158 Welding Pen Head (1 Set) - battery building product
$7.99 USD
AWithZ WP158 Welding Pen Head (1 Set)AWithZ
Nickel-Plated Steel Strip for Battery Spot Welding – 5m Roll (Multiple Sizes) - battery building product
From $8.95 USD
Nickel-Plated Steel Strip for Battery Spot Welding – 5m Roll (Multiple Sizes)DIY500AMP.COM
Pure Copper T2 Strip for Battery Spot Welding – 5m Roll (Multiple Sizes) - battery building productPure Copper T2 Strip for Battery Spot Welding – 5m Roll (Multiple Sizes) - battery building product photo 2
From $11.95 USD
Pure Copper T2 Strip for Battery Spot Welding – 5m Roll (Multiple Sizes)DIY500AMP.COM
Pure Nickel Strip Roll for Battery Spot Welding - battery building productPure Nickel Strip Roll for Battery Spot Welding - battery building product photo 2
From $14.99 USD
Pure Nickel Strip Roll for Battery Spot WeldingDIY500AMP.COM
Nickel-Plated Copper 0.2 × 10 mm (5 Meters) – High Conductivity T2 Copper for Battery Building - battery building productNickel-Plated Copper 0.2 × 10 mm (5 Meters) – High Conductivity T2 Copper for Battery Building - battery building product
From $18.95 USD
Nickel-Plated Copper 0.2 × 10 mm (5 Meters) – High Conductivity T2 Copper for Battery BuildingDIY500AMP.COM
Flux for Copper-to-Copper Spot Welding (100g) - battery building productFlux for Copper-to-Copper Spot Welding (100g) - battery building product photo 2
$19.95 USD
Flux for Copper-to-Copper Spot Welding (100g)DIY500AMP.COM
AWithZ Base Angled ABS Stand - battery building productAWithZ Base Angled ABS Stand - battery building product photo 2
$19.99 USD
AWithZ Base Angled ABS Stand for AWithZ P20B/ P30C / P60F Spot WeldersDIY500AMP.COM
AWithZ Base Angled ABS Stand - battery building productAWithZ Base Angled ABS Stand - battery building product photo 2
$29.99 USD
AWithZ Base Angled ABS Stand for AWithZ P90C/ P120D Spot WeldersDIY500AMP.COM
AWithZ H5 Mini Spot Welder – 5000 mAh Battery, 0–0.35 mm Welding, TFT Display - lithium-ion battery cellAWithZ H5 Mini Spot Welder – 5000 mAh Battery, 0–0.35 mm Welding, TFT Display - lithium-ion battery cell photo 2
$59.99 USD $69.99 USD
AWithZ H5 Mini Spot Welder – 5000 mAh Battery, 0–0.35 mm Welding, TFT DisplayAWithZ Sold out - ETA about 4 weeks
AWithZ WP158 Spot Welding Pens – Premium Copper Handheld Electrodes for Battery Building - battery building productAWithZ WP158 Spot Welding Pens – Premium Copper Handheld Electrodes for Battery Building - battery building product photo 2
$59.99 USD
AWithZ WP158 Spot Welding Pens – Premium Copper Handheld Electrodes for Battery BuildingAWithZ
AWithZ WP240 Multi-Functional Spot Welding Pen - battery building productAWithZ WP240 Multi-Functional Spot Welding Pen - battery building product photo 2
$99.99 USD
AWithZ WP240 Multi-Functional Spot Welding PenAWithZ Sold out - ETA about 4 weeks

Customers are saying

4.95 ★ (292)
Verified

Real customer builds

Battery builders using DIY500AMP gear

Photo reviews from real DIY builders using cells, spot welders, copper, and battery pack supplies from DIY500AMP.

Customer-built EVE 30PL 18650 battery pack for a model airplane

*****

EVE 30PL flight pack

More power, lower weight, and a first 18650 pack that made the builder want to build more.

Paul Taylor - EVE 30PL
Customer photo of an AWithZ spot welder used for copper battery welding

*****

Copper-ready welding

Spot welds 0.3 mm copper with serious output, fast charging, and easy menu control.

Owen W. - AWithZ P30C
Customer 6S2P 21700 battery pack installed for RC flight testing

*****

21700 pack results

Awesome flight time with less heat buildup than LiPo packs in a demanding EDF test.

DarthFlyer - 6S2P 21700 pack
Customer 21700 high-capacity cell project using a DIY500AMP battery cell

*****

High-capacity cell build

High capacity for an ultralight phone-charger project, backed by same-day shipping.

Matthew Cordova - FEB 21700
Customer-built 21700 Makita battery case with BMS and cells

*****

DIY battery case support

A practical 21700 Makita case review that also calls out fast, personal support.

Mark Trible - Makita DIY kit
Customer photo of a compact AWithZ pocket spot welder kit

*****

Entry welder proof

A budget pocket welder that worked perfectly for small battery repairs and charges fast.

Ryan Scott - Kerpu CP01

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