This is a miniature battery charger based on the TP4056 integrated circuit. It is ideal for adding an embedded battery charger to your new project. Charge Li-Ion batteries from on board Micro USB connector from USB or external +5V source. With Micro-USB onboard connector, you can directly connect to computer USB port for battery charging. If USB is not available you can use a external source voltage at IN+/IN- pads Great for DIY projects Chipset: TP4056 Input voltage: 4.5V~5.5V Fully charged voltage: 4.2Working temperature: -10''C~85''Charging method: Linear charging 1%Charging precision: 1.5%Charging indicator: Red light charging, Green light fully charged Interface: Micro USB Maximum charging current: 1000mA Micro USB female outlet for input end, can be used to charge the lithium battery by 5v charger directly. Connect to positive electrode of battery and to the anode. Connect to load. Brand: Arduino Type: Charge Controller /.