Just like gfretwell says
"Connected is series you have the same amp hours at twice the voltage
Connected in parallel you double the amp hours at the same voltage"
"Two 6 volt, 10 Amp Hour batteries connected in series = 12 volts, 20 amp hours" ... nope ... 12v 10A
"Two 6 volt, 10 Amp Hour batteries connected in parallel = 6 volts, 20 amp hours" ... uh huh
