5000mAh 21700 Battery Cells

These are genuine BAK N21700CG-50 battery cells. They are not pulls, rewraps, or recycled cells. BAK is an established manufacturer that supplies cells for major e-bike and energy storage brands. These are perfect for battery pack builds, solar installs, e-bikes, and DIY power projects.

The backstory for these particular cells is they were purchased by an EV battery company that hoped to build hot-swappable battery packs for EVs to minimize charging times. As fast charging has gotten faster and faster, I don't think that panned out that well.

Each cell will arrive pre-charged to ~3.6V

📦 Specifications

1. Model: BAK N21700CG-50
2. Size 21700 (≈21×70 mm)
3. Nominal Voltage: 3.60V
4. Charge Voltage: 4.20V max
5. Discharge Cutoff: 2.5V
6. Capacity: Rated 5000 mAh
7. Maximum Charge Current: 5A
8. Max Continuous Discharging Current: 10A
9. Chemistry: NCA Li-ion
10. Top Type: Flat Top

> ⚠️ Disclaimer: Lithium ion batteries may explode or burn due to improper use. Using these batteries for purposes not intended by the manufacturer, including outside a battery pack and/or without a BMS, may cause severe injury and damage. I am not responsible for any injuries caused by lithium ion batteries - use at your own risk.