Specifications BrandASTROLUXModelC2150RProduct Name21700 Li ion Rechargeable BatteryButton TypePointed topCapacity5000mAhNormal Voltage3 7VChargeTemperature0℃ 45℃Discharge Temperature 20℃ 60℃Storage Temperature 20℃ 20℃Charging TypeBuilt in Fast USB C Charging Port Can Be Charged DirectlySize76mm 20mm ±2mm Length Diameter Features 1 Deep life cycles Li ion cell safe and rechargeable 2 5000mAh large capacity supplies long run time 3 Built in Fast USB C Charging Port Can Be Charged Directly 4 Suitable for many tools like Flashlights RC Toys Home Tools Children Toys Package includes 1 x 21700 Lithium Battery 1 x Plastic Base