I forgot to purchase a charger for my VX6r. so insted of waiting all week for a charger to get here i have quiet a few wallwart chargers in a box. i found the correct adapter and i found a wallwart that puts out: 15.160vdc @ 300mW is this okay to charge my HT and battery?? or is the voltage too high? I dont plan on using the HT while its plugged in...