Ampace JP40 21700 4000mAh 70A Tabless Battery｜ Other Products

Ampace JP40 – Built Tough for High-Drain DIY Projects
If you’re building a powerful e-bike, tool pack, or custom energy rig, the Ampace JP40 is your go-to cell. With a massive 70A pulse discharge and fast charge support, it’s built to handle extreme output without compromising longevity.


4000mAh Capacity: Plenty of runtime in a single 21700 cell

Up to 70A Peak: Delivers huge power bursts when needed

4A Standard Charge / 8A Fast: Recharge faster, build smarter

600+ Cycle Durability: Excellent performance retention over time

Ready for Cold or Heat: Works from -30°C to 75°C


SPECIFICATIONS



Manufacturer:
Ampace


Model:
JP40


Size:
21700


Positive Terminal:
Flat Top


Nominal Capacity:
4000mAh


Continuous Discharge Rating (max):
60A (No Temperature Cut-off) / 70A (With Temperature Cut-off)


Nominal Voltage:
3.7V


Maximum Voltage:
4.2V


Discharge cut-off Voltage:
2.5V


Protected:
NO, UNPROTECTED.


Pulse Discharge (5s):
140A


Standard Charge Current:
4A


Fast Charge Current:
8A


Cycle Life:
≥2400mAh after 600 cycles @ 30A / ≥2400mAh after 400 cycles @ 40A


Operating Temperature:
-30°C to 75°C (Discharge) / 0°C to 60°C (Charge)


Rechargeable:
Yes


Approx. Dimensions:
21.1mm x 70.1mm


Approx. Weight:
68g


Country of Origin:
China




Data Specification Sheet:
Ampace JP40 21700 Li-ion Battery Datasheet
Brand:AmpaceCategory:21700 BatteriesSKU:AMPACE-JP40