Batboard

I have a mobil install that the device calls for 10.5 volts at 1.2 amps. Would the 12vdc battery voltage suffice or would this cause problems?

Vehicle running your typically looking at 13.8 volts. Some devices are more voltage sensitive than others.

what exactly is it? is it made for a vehicle? if so then there's no reason it shouldn't handle 12-14 volts. but if it's a home charger that you're trying to make work in a vehicle then that's a different story. if all else fails contact the manufacturer