This charger is a very small battery charger module. It uses the TP4056 controller and standard configuration is with 1A charge current.
Technical Specifications
Module Name: rechargeable lithium battery plate
Method: linear charge 1%
Charging current: 1A Adjustable (Through RPROG)
Charge Accuracy: 1.5%
Input voltage: 4.5V-5.5V
Full charge voltage: 4.2V
Charging indicator: red green full charge
Charging input interface: mini USB
Working temperature: -10 Degree to +85 Degree
Polarity Reversal: NOT ALLOWED
Weight: 10g external
Dimensions: 25 * 19 * 10mm