Originally Posted by Earl43P
Methinks you need a different power source than a charger.
They don't typically put out 12v like a battery does. Depends on how they are rectified. 4A tells me it is a cheapy that you can't use to jump-start a car, so I'd expect it to put out some 1/2 wave rectified DC pulses, not a pure 12V.
Its a trickle charger not a jump pack, and its OOOOLLLLD. It works great for when your amp drains your battery while you are working on the truck. I have used that same battery charger to power explorer power seats so I know that its got a decent power out put.
I think that I will wire everything up and then check it before cutting the hole. I didnt even think of that.