3.7V Li-ion rechargeable battery made of 1 PCS of high quality Cylindrical 18650 cell with PCB and polyswitch for full protection Cell: 18650 (High quality Panasonic/SANYO/Samsung/LG/Chinese A Grade or as per special requirement ) Capacity: 2800mAh Voltage: 3.7V Battery Pack: 1S 3.7V 2.8AH Pack: PVC Shrink tube Prewired: 22 AWG wire with connector(as per customer's requirement) Dimensions: (HxD) 68mm X18mm Weight: 60g (About) Technique: Charging Voltage: 4.2V CC/CV Maximal continuous discharging current: 1.5A Over charge detection voltage: 4.28V ? 0.025V Over charge release voltage: 4.08 ? 0.025V Over discharge detection voltage: 2.4V ? 0.05V Over discharge release voltage: 3.0V ? 0.05V Over charge protection Over discharge protection Over Current protection Short Protection: Exterior Short Circuit and can be automatic recovery Low Interior resistance Temperature: Charging temperature: 0 - 45 C degrees Discharging temperature: -20 - 60 C degrees Storage temperature: -20 - 45 C degrees Specifications voltage: 3.7V Current capacity:2800mAh Weight 60g Battery color: customized