I'm going to use my phone at a trail gps and speedometer so I want a power supply for the phone. I took an accessory plug and mounted to the fender and tapped into the black and blue wire off the voltage regulator. Yeah.... I fried my phone and my the male cig plug in the process. Anyone have ideas? I was thinking of a small battery. One will fit under the seat. Charge it up and it should run a phone for a day. Will the stock lighting coil recharge the battery?