pointed top battery Brand new battery Model: ICR18650 3.7V Li-ion Battery Size: 18*65.0mm 1800mAh Capacity Storage Voltage: 3.7-3.9V Charging Cut-off Voltage: 4.2V Discharge Cut-off Voltage: 3.0V Protected: NO Battery top: pointed Long lasting and rechargeable battery For mini fan & microphone/Flashlight/Radio /DIY powerbank Low discharge rate