Charge module - Linear charging.Current - 1A And Full Board 4A adjustable.Charge precision - 1.5%.Input voltage - 4.5V-5.5V.Full charge voltage - 4.2V.Led indicator - red is charging Green is full charged.Input interface - Type-C.Work temperature -10° to +85°.Inversed polarity - NO.Battery Capacity- 4PCSModule Watt- 20Watt