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Keeppower P1621U Micro USB 16650 3.6V 2100mAh Rechargeable Battery
* Quality Protected Li-ion Rechargeable Battery
* Brand: KeepPower
* Part No.: P1621U
* Maximum Size: (D)16.7*(L)70.2mm(±0.2mm)
* Nominal Voltage: 3.6V
* Nominal Capacity: 2100mAh
* Weight: 40.0g
●  Part No.: P1621U
●  Protected 16650 Li-ion Rechargeable Battery
●  Minimum Capacity: 2000mAh
●  Typical Capacity: 2050mAh
●  Normal Voltage: 3.6V
●  Standard Continuous Charging Current: 630mA (by USB)
●  Maximum Continuous Discharging Current: 2A
●  In Built Safety Circuitry
●  Protection Circuit (Against over charge, over discharge, over current and short-circuit.)
●  Charge Voltage by USB: 5V
●  Over 300 charge-discharge cycles


Update with: higher quality button toplights prompt for charging status, better dimension fits for more devices