Basic Charging Question

[rawfuls]

Hey guys,

Going to a park sometime next week, for an 'RC day' with a few friends.

Anyways, wanted something that could power my charger so we could just keep going..

I discovered a 24V 16Ah Lead Acid battery that I've left.. alone, in my go-cart..
I also discovered a 12V 7Ah in one of the flashlights that my dad owns (one of those 1 million candle watt power suckers form Costco?)..

Besides tossing them on my Bantam BC6 charger, how else could I charge these guys?

The 12V one has normal terminals (I could charge that via Bantam, just would take ages), but the 24V has small-ass leads (10-12AWG ?) coming out of the case..

I want to keep these tamper-proof as possible, but was wondering if a car charger would work..

I'm assuming the answer is yes, but just wanted to make sure, since I don't want these going kablooey!

In addition, could I use a basic, Bantam BC6 charger on the 24V?
Wouldn't the charger only pull the voltage that it needs? (between 11.5 and 14V)