Charge your phone from the battery
How to charge your phone from any 6, 12, 24, 36 volt battery. A simple and affordable way to charge your mobile phone during a power outage. Quickly charge your smartphone from a power tool or car battery. Step-down stabilizer DC-DC 6-40 V, 2 USB, 5V 3A, LM2596S for fast charging the phone from the battery.