20pcs USB 3.7V 3.6V 4.2V 1A 18650 TP4056 Lithium Battery Charger Module Charging Board Li-ion Power Supply Board

Feature Charge module Linear chargingCurrent 1A Charge rate 1 5 Input voltage 4 5V 5 5VFull charge voltage 4 2VLed indicator Red is charging Green is full chargedInput interface USBWork temperature 10° to 85°Inversed polarity NOSize 25 x 19 x 10mm Note 1 Ampere meter can only be connected to 5v input end of the module 2 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 3 The connection wire should not be too thick 4 Make sure the connect point is good 5 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 6 NO Reveral polarity Package Included 20 x 5V USB 1A 18650 Lithium Battery Charging Board Charger Module