Premium Batteries for Serious Builds
Authentic 21700 & 18650 batteries from Molicel, EVE, Tenpower, Reliance, Ampace & more — tested, graded, and ready for your next DIY battery pack, EV, or power tool project.
Find What You Need
From individual batteries to complete build components, we stock everything for your battery projects.
21700 Batteries
High-drain, high-capacity, and balanced 21700 batteries from Molicel, Ampace, EVE, Tenpower, and Reliance.
18650 Batteries
Compact 18650 batteries for power tools, flashlights, portable power, and smaller battery builds.
Milwaukee M18
Custom battery packs built with premium cells. Choose from our lineup, or we can rebuild yours.
DeWalt 20V
Custom battery packs built with premium cells. Choose from our lineup, or we can rebuild yours.
Strips & Busbars
Pure nickel, copper-nickel composite, and copper strip for spot welding and soldering.
BMS & Protection
Smart BMS boards, fuses, and thermal management components for safe pack construction.
Holders & Hardware
21700 battery holders, spacers, and assembly hardware for clean pack builds.
Wire & Connectors
Silicone wire, XT60/XT90, Anderson plugs, heat shrink, and more for clean, safe connections.
Custom Battery Packs
Tell us your voltage, capacity, and form factor — we'll build it for you with premium batteries.
Best Sellers
The most popular batteries in our lineup, trusted by builders worldwide.
Compare Popular 21700 Batteries
Find the right battery for your application — whether you need max current or max capacity.
| Cell | Capacity | CDR | Weight | Best For |
|---|---|---|---|---|
| Ampace JP40 | 4000mAh | 40A | 68g | High-power EV, tools |
| Molicel P45B | 4500mAh | 45A | 70g | Performance EV, scooters |
| Molicel P42A | 4200mAh | 45A | 70g | E-skate, power tools |
| Tenpower 50XG | 5000mAh | 10A | 69g | E-bike, solar, powerwall |
| Reliance RS50 | 5000mAh | 15A | 68g | Balanced power & capacity |
| EVE 40PL | 4000mAh | 12A | 68g | Budget builds, storage |
Custom Battery Pack Builder
Need a specific voltage, capacity, or form factor? We build custom packs to your exact specifications.
Your Specs.
Our Build.
Tell us what you need and we'll engineer a pack using premium tested batteries, quality copper and nickel strip, and a properly rated BMS — built right the first time.
- Choose your battery chemistry & brand
- Specify series/parallel configuration
- Custom form factor & enclosure options
- Smart BMS with Bluetooth monitoring
- Tested & QC'd before shipping