I don't understand electric stuff and never have. Here is a question that will illustrate my ignorance.
I've got a disabled person type lifter that has a 24 volt motor (at least I can read the label for that info) and is run by two tiny 12v batteries. I use it for lifting beehives on and off my ute and am a bit worried about it running out of go, out in the bush somewhere. So the question, can I use two car type 12v batteries to power it? Without buggering it? :?