Key Features
- High-Load Performance: Sustains up to 45A continuous discharge with minimal voltage sag.
- 4200mAh Capacity: Efficient energy storage for extended runtimes in demanding systems.
- NMC Chemistry: Stable LiNiMnCoO2 formulation ensures heat resistance and durability.
- Low Resistance Architecture: Internal resistance ≤8mΩ supports high current throughput.
- 500 Cycle Life: Maintains dependable output across hundreds of charge cycles.
The BTCAP 42P is a robust, unprotected 21700 cell engineered for high-power delivery in lithium-ion battery packs. Its 45A continuous discharge rating and 4200mAh capacity make it well-suited for builds that demand both endurance and instantaneous output. Built with NMC chemistry, it combines thermal stability with impressive power handling—essential for power tool packs, e-mobility, and robotics.
Applications/Uses
- Robotics Systems: Ideal for builds requiring sustained current with minimal degradation.
- High-Performance Tools: Maintains energy efficiency during peak-load operations.
- RC & Hobbyist Builds: Perfect for electric toys and drones needing long runtimes.
- EV Battery Modules: Integrates into battery arrays where discharge stability is critical.
- Custom DIY Packs: Great for creators needing reliable, high-drain 21700 cells.
SPECIFICATIONS
| Manufacturer: | BTCAP |
| Model: | 42P |
| Size: | 21700 |
| Positive Terminal: | Flat Top |
| Nominal Capacity: | 4200mAh |
| Continuous Discharge Rating: | 45A |
| Nominal Voltage: | 3.6V |
| Maximum Voltage: | 4.2V |
| Discharge Cut-Off Voltage: | 2.5V |
| Protected: | No, Unprotected |
| Rechargeable: | Yes |
| Approx. Dimensions: | 21.6mm x 70.5mm |
| Approx. Weight: | 68g |



