With this device, you can charge your mobile using your RC Battery.
USB Output:5V, 1000mA
Input Voltage:DC 7.5V~25.2V
Battery Meter Voltage Precision:+0.01V~ -0.01V
Usage:Test for LiPo/Li-ion/LiMn/Li-Fe Batteries

Features:
This GT Power portable battery charger/power supply features a standard USB output port that may be connected to any portable device (such as a mobile phone) that can be charged from a USB port at 5V/1A. Input power is supplied by any 1-6S lithium pack. The charger has an integrated low-volt cut-off circuit to prevent over discharge.

Note:
The USB output will be cut off automatically if any batteries` voltage is lower than 3.0V and at the same time the LED tube will display "SOP"