Li-ion rechargeable battery.
No memory effect.
Short circuit and over-current protection.
Can be recharged over 500 times.
Voltage of full charge and empty condition is 4.2V & 2.75V respectively.
Environment friendly: no toxic waste.
Weight: 19.26 g
Size: 18.104.22.168 cm
2 × UltraFire LC 10440 3.6V 500mAh Rechargeable Battery