Efest

Battery Efest 3500 mAhCapacity: 3500 mAhVoltage: 3.7VSize: 18650Discharge end voltage: 2.5VStandard charging current: 1.25ACharging voltage: 4.20 + -0.05VThe highest continuous discharge current: 25AThe highest short-peak discharge: 35ANote: The price includes (1)..

 Efest Slim k1It only holds one batteryPortable design with high quality piano stringsIt features overcurrent, overvoltage and short circuit protectionLED indicator light for battery lifeDual slot micro USB charger 5V/1A each slot monitors independently..

 Efest Slim k2It only holds two batteriesPortable design with high quality piano stringsIt features overcurrent, overvoltage and short circuit protectionLED indicator light for battery lifeDual slot micro USB charger 5V/1A each slot monitors independently..

 Efest Slim k4It only accommodates four batteriesPortable design with high quality piano stringsIt features overcurrent, overvoltage and short circuit protectionLED indicator light for battery lifeDual slot mini USB C charger 5V/1A each slot monitors independently..