For battery cells, review the product description for real-world current recommendations, testing notes, and application guidance. Manufacturer maximum ratings should be treated as limits, not the best target for long-term pack health.
Description
8S2P 21700 Battery Kit
Build an 8-series, 2-parallel 21700 lithium-ion pack using a purpose-matched tray and precision battery-building materials. Choose the kit only or add one of the listed cell models. A cell-inclusive selection contains 16 cells total.
Choose Your Configuration
- Kit only - no cells: battery-building hardware without cells.
- Cell option: adds 16 cells of the selected model and links those cells directly to Shopify inventory.
- 0.2mm copper + 12 AWG: lighter build option.
- 0.3mm copper + 10 AWG: heavier-conductor option for builders prioritizing lower conductor resistance.
Kit Contents
- Custom lightweight 8S2P tray for 16 21700 cells
- Precision-cut copper busbar set for the selected build option
- Stainless-steel welding circles for copper-to-cell sandwich welding
- Matched power leads for the selected cable option
- 1 x 8S JST balance cable with 9 pins
- Selected cells only when a cell-inclusive option is chosen
This is an unassembled DIY battery-building kit, not a finished battery pack. Spot welding, insulation, BMS/protection selection, balance wiring, pack validation, and final enclosure are the builder's responsibility.
Important Electrical Guidance
Pack capability depends on the selected cells, weld quality, current sharing, conductor geometry, BMS limits, fusing, cooling, and the completed pack design. Manufacturer data-sheet maximum ratings are limits, not automatic recommendations for continuous pack operation. Design with appropriate current and thermal headroom.
Safety Warning
Use only new, matched cells in a properly engineered pack. Insulate all conductive layers, protect against shorts and abrasion, use correctly rated BMS and fusing, verify polarity before welding, and monitor cell voltage and temperature during assembly and testing. Lithium-ion cells can vent, ignite, or cause serious injury if shorted, crushed, punctured, overheated, overcharged, over-discharged, or assembled incorrectly. Intended for experienced battery builders.
Orders ship from Florida when inventory is available. Lithium-ion cells require proper handling, protected packs, correct chargers, and safe storage. Do not solder directly to battery terminals.
Payment and Security
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Let customers speak for us
Everything is great 100%recommended fast and
Everything is great 100%recommended fast and professional
Daniel Kammerdiener
Pure Nickel Strip Roll for Battery Spot Welding
One of my cell orders was short one cell
One of my cell orders was short one cell. When I went to send a text to the customer contact (this is rare and awesome way to reach out), the reply on a national holiday came within 15 min. That level of customer service is incredible, like family. I really appreciate that!
Joseph Krienert
DIY500AMP.COM
Wow, these cells are great!
I purchased some of these tabless cells to try on my 1S 3" HD Toothpick drone build, and, albeit a bit heavy for 1S, it flies pretty well. Not a freestyle monster, but an endurance beast with decent send. These cells shrug off the demands of a BETAFPV Matrix HD AIO flight controller/12A ESC and some 1202.5 11000KV motors. I'm getting 15+ minutes of speedy flight time from a single cell trying not to go below 3.2V, and about 20+ minutes cruising. Love these cells and will definitely buy more when time comes, only from DIY500AMP, who are terrific!
VN in AZ
EVE 30PL 18650 3000mAh 60A Battery Cell - Tabless
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