Gembird Lithium-ion 18650 battery, protected, 2600 mAh PROTECTED: The integrated safety board protects the cells against overload, short circuit and deep discharge, so the battery is better protected against incorrect usage, which guarantees a longer lifetime without worries. VERSATILE: Perfect for use in a wide range of high power devices. DURABLE: Low self-discharge and good for many charging cycles. Because of the low self-discharge, the battery will keep its energy for a long time, even when not in use 3.7 V rechargeable Lithium-ion 18650 battery Provides long lasting energy with very low self-discharge Integrated protection PCB protects against overload, short circuit and deep discharge Suitable for use in e.g. LED torches, laser pens, etc. Note: because of the protection PCB the battery is approx. 3 mm longer than most unprotected 18650 Li-Ion batteries. Specifications Nominal voltage: 3.7 V Capacity: 2600 mAh Over-charge voltage limit: 4.3 ±0.05 V Over-discharge voltage limit: 2.4 ±0.1 V Continuous discharge rate: 3.0 A Max. Peak discharge rate: 5.0 A Operating temperature: charge 0~45 °C, discharge –20~60 °C Storage temperature: -20~45 °C Storage voltage: 3.7 - 3.85 V Maximum constant charging current: 2000 mA Dimensions: diameter 19.5 mm, height: 70.5 mm Net weight: 47.5 g System requirements Attention : Rechargeable Li-ion batteries should be handled with the greatest care by persons who are aware of the dangers of incorrect use. KEEP AWAY FROM CHILDREN