[Al Skierkiewicz]

Hooking batteries in parallel to charge them is a fruitless way to go. There is only one right way to charge multiple batteries and that is with a multi charger designed for multiple batteries. Although lead acid batteries do not require sophisticated chargers, the charger provided in the kit and several available in retail or online are "smart" chargers. These "smart" chargers alternately supply charge current and monitor or even slightly discharge the battery to determine charge state. A smart charger will not only limit the maximum current but will charge your battery in the most efficient and shortest possible time. Placing batteries in parallel for any reason, is a sure way to shorten battery life.
Failure to follow electrical rules (or any safety related rules) in the pit is a sure way to get your team in trouble.