Note: The battery belongs to dangerous goods. It has strict requirements on transportation and packaging. The delivery period is about 15-20 days. If you have time requirements, don't buy it. Thank you for your patience and understanding.Features:Rechargeable Re/discharge protestion circuit.Low reoccurring operation cist, short-circuit and over-current protective.Safe and environmental friendly.Perfect for flashlight or electronic gadgets.Keep in a dry and cool place.Specifications:Model: 18650Capacity: 19800mAhVoltage: 3.7VChemistry: Li-ionSize: 65mm (length) x 17mm (dia.)Product Name: 18650 chargerFeatures: 4 slots independent chargingProduct Weight: 106 gramsPower supply mode: regular USB power supplyInput voltage: DC 5v 1-2aOutput voltage: DC 4.2V 1000mA