Im building a launch controller and im looking for a small motorcycle battery or 12v 6+amp battery small enough to fit in the hobby box im looking to use (havent decided on dimensions yet). Im just looking at walmart for more questions i can look up later i guess, and i see this relatively cheap 12v jump starter kit with adjustable amp output. This seems perfect to hook up to a launch system, anything i should think about before trying it? Its about 40 bucks