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Keeppower P1835U (Ver.2020) Micro USB 18650 3.6V 3500mAh Rechargeable Battery
* Quality Protected Li-ion Rechargeable Battery
* Brand: KeepPower
* Part No.: P1835U(Ver.2020)
* Maximum Size: (D)18.5*(L)70.2mm
* Nominal Voltage: 3.6V
* Nominal Capacity: 3500mAh
* Weight: 48.0g
●  Part No.: P1835U (Ver.2020)
●  Protected 18650 Li-ion Rechargeable Battery
●  Minimum Capacity: 3350mAh
●  Nominal Capacity: 3500mAh
●  Normal Voltage: 3.6V
●  Standard Continuous Charging Current: 750mA (by USB), 1A (by li-ion battery charger)
●  Maximum Continuous Discharging Current: 8.0A
●  In Built Safety Circuitry
●  Protection Circuit (Against over charge, over discharge, over current and short-circuit.)
●  Charge Voltage:
    4.20V maximum voltage and 2.50V cut-off voltage (by li-ion battery charger)
    5.0V (by USB)
●  Over 500 charge-discharge cycles

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