Professional-grade lithium batteries for e-bikes, scooters, golf carts, and every adventure. Real specs. Smart BMS. Certified safety. Ships fast from US warehouses.
From a single 18650 cell to a 72V e-bike pack and 51.2V LiFePO4 golf-cart bank - CBJJ engineers verified-capacity power for the real-world devices riders, makers and clinicians depend on every day.
HY05 / HY07 series - 48V 30Ah (1440Wh) and 60V 20Ah (1200Wh) packs with 30A continuous BMS, XT60 + GX16 connectors. Built for fat-tire e-bikes, scooters and mopeds.
A-grade cells with verified capacity (no relabeling). Tested for internal resistance, cycle life and self-discharge before they ship - ready for flashlights, vape mods and DIY builds.
Flagship ZW27 - 38.4V 105Ah / 4032Wh LiFePO4 with Bluetooth APP, 150A continuous (1000A peak), 4,000+ cycles. Drop-in replacement for Club Car, EZ-GO and Yamaha.
HY03 universal pack - 25.2V 5Ah / 126Wh, 15A continuous (50A peak), DC + 2-pin connector. Engineered for mobility scooters, electric tools, fish finders and ham radios.
HY07 - 60V 20Ah / 1200Wh long-range pack with 71.4V full charge, 30A BMS and burst-rated 140A peak. Designed for performance e-scooters and custom EV builds.
SL-B26 series - no charger needed, plug-and-play USB-C. 1.5h fast charge, 1,500+ cycles, low self-discharge. Perfect for smart locks, security cameras and EDC flashlights.
Use the lower-voltage packs for deep-cycle series builds, RV, marine, and backup systems, or step up to 38.4V / 51.2V packs for higher-output golf cart and LSV conversions.
The new golf-cart material is now used where it helps most: clear voltage tiers, real accessory sets, and responsive media that keeps the page light.
Compact deep-cycle pack with app monitoring.
Higher-voltage platform for RV, marine, and cart builds.
Flagship 4032Wh pack with Smart BMS protection.
Premium high-voltage option for stronger conversions.
Start with the use case, then match voltage, capacity, connector, chemistry, and BMS with the right CBJJ platform.
38.4V and 51.2V packs with deep-cycle chemistry, Bluetooth BMS options, and US-ready support.
Every spec listed here is printed on the actual product label - verified Wh, continuous current and peak burst. No marketing inflation, no relabeled cells. Just the real performance our QC line signs off on.
LiFePO4 - Bluetooth Smart BMS
21700 Cells - 30A BMS - XT60
21700 Cells - 30A BMS - XT60
18650 Cells - 15A BMS - DC + 2-pin
Real footage from our 38.4V 105Ah LiFePO4 production line - assembly, BMS pairing, and pack-level QC. The same pack that powers EZGO, Club Car, and Yamaha drive trains worldwide.
Every CBJJ cell comes from tier-1 manufacturers. We test capacity, internal resistance, and discharge curves before assembly. No B-grade. No surprises.
Our packs ship with integrated multi-layer BMS protection by default - not as an upgrade. Overcharge, over-discharge, short-circuit, thermal, and overcurrent protection.
Honest mAh ratings. Honest discharge rates. Honest cycle life. No inflated numbers - verified by independent labs and 10,000+ customer hours.
CBJJ stands for Core - Brilliance - Journey - Joy. We believe every journey deserves a reliable, brilliant core of power - whether you ride an e-bike through city streets, build a custom solar setup, or trust a flashlight on your next adventure.
From premium 18650/21700/26650 cells to fully custom 12V - 2V battery packs, CBJJ delivers verified specs, smart BMS protection, and 7-day expert support - already trusted by 10,000+ riders, makers, and professionals worldwide.
Four reasons riders, makers, and professionals choose CBJJ - and stay.
Premium A-grade cells deliver longer runtime per charge and slower capacity fade over years of use.
Smart BMS protects against overcharge, over-discharge, short circuit, and over-temperature - every time.
Talk to actual battery engineers 7 days a week - for fitment, replacements, or DIY builds.
UL2271, UN38.3, MSDS, FCC, CE - your battery is shippable, safe, and compliant worldwide.
Real reviews from Amazon US. Verified purchases. Unedited.
Every CBJJ product meets or exceeds international safety and performance standards.
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