Originally Posted by
infernogt1
i did use them right out of the package with out charging them because they both had a full 12v charge in them
I don't know if you're talking about gel-cell or lipo, but the voltage reading from some battery types doesn't always mean much.
A battery - or any other source - may read 12v on your meter, but it may actually be about dead. Voltage can drop quickly when you put a load on it, if the source lacks the current to sustain it.