My wife lost the charger for our daughter's 6v battery that powers her electric ATV. This is an odd question, but worth a shot. Can I use my car recharger with auto shutoff to charge this type of battery?

 

i dont know about your charger but mine has a selector for 6v, 12v-regular, 12v-deepcycle, 12v-asm, gel type

 

I would be worried that it might put out too many amps for that battery. I don't really know but it doesn't sound like a very good idea, but hey what's the worst that could happen? You might have to buy a new charger and a battery.