CSTAL 3.7V 600Mah Li-Ion Rechargeable Battery, High Performance Backup Battery, for Remote Control LED Lights Flashlight, 4 Pack

✔ 100% Brand New, Rechargeable 10440 AAA Size Li-ion Batteries. ✔ Stable performance, small internal resistance, no ''memory effect'', Safe green power, protects against short-circuit, over discharge, over charge and over-current, effectively extend the lifespan of battery. ✔ Quality steel shell, very sturdy and durable, effectively prevents battery from leakage, environmental friendly, tested under strict quality control standards. ✔ High energy density and long charge cycles make it ideal for long-term everyday use. ✔ It is widely used in flashlights, electric shavers, power banks, microphones, radios, mini audio, amplifiers, LED lights, clocks, cameras, remote controls, portable printers, walkie-talkies, portable DVDs, etc.