It's safe and easy to use， just fasten and then use. When the battery is fully charged， it will stop the output charge current to prevent overcharging and inflating.<br> <br> Features:<br> Advanced design: use double line transposon， greatly meet the mass of charging requirements.<br> The protection in place: limiting 2A， if not carefully access high voltage， load protection monitoring function is automatically disconnected power supply.<br> Short circuit protection: if the battery has positive and negative short-circuit， the warning lamp illuminates， remember not to charge the battery.<br> Visual display: a dual digital form， can display current， voltage， improving efficiency.<br> Precise adjustment: current， voltage trimming resistor， can achieve higher accuracy of operational requirements.<br> Safe and easy to use: fasten and then use; when the battery is fully charged， it will stop the output charge current to prevent overcharging and inflating.<br> Low pressure activation: can be activated when voltage is below 3V and under 2.5V.<br> <br> Specifications:<br> Current， Voltage Display<br> USB Input Interface<br> Short Circuit and Power LEDs<br> Current， Voltage Precision Regulator<br> 4G / 4S / 5G / 5S / 6G / 6P Bilateral Battery Connector Bayonet<br> Battery Activation Switch<br> Circuit Board Size: 142 * 75 * 13mm / 5.6 * 2.95 * 0.5in (L * W * H)<br> Circuit Board Weight: 48g / 1.72oz<br> Package Size: 23.5 * 15.5 * 2cm / 9.25 * 6.1 * 0.8in (L * W * H)<br> Package Weight: 85g / 2.99oz<br> <br> Package List:<br> 1 * Circuit Board<br> 1 * USB Cable<br> 1 * Power Maintaining Cable<br>  <br>  <br>  <br>  <br>  <br>  <br>  <br>