That's about the same as the battery on 650Central.com. Their description says it'll work in all but the longest traffic jams (or something to that effect). The idea is to not lose your lights when you're at a stop light, without having to 'rev' it, like what often happens with a capacitor. As long as it's sealed (it says so?), you shouldn't have a "leak" problem. They're supposed to not be position sensitive. Good luck, and keep us posted (for future reference...).