3Pcs Mini 1A Lithium Battery Charging Board Charger Module USB InterfaceDescription Charging method linear charge 1 Charging current 1A adjustableCharge accuracy 1 5 Input voltage 4 5V 5 5VFull charge voltage 4 2VCharging indicator Red charging green full chargeCharging input interface Mini USBWorking temperature 10C to 85CReverse NOSize 25 x 19 x 10mmNote Ampere meter can only be connected to 5V input end of the module It is better that the charging current is 37 of the battery capacity If you charge to the battery of 1000mAH current of 400 is enough The connection wire should not be too long Make sure the connect point is good If the input voltage is too high like 5 2V the current will be less than 1000mA it is normal It is protection function Auto substract the charging current to avoid burn damage to chip Input reverse has no effect on the chip but the output battery terminals reverse will burn chips Applications This module is used for single or multi section parallel lithium lithium rechargeable battery charging from the USB port to take power Package included 3 x 1A lithium battery charging module