I am looking into different options for upgrading my battery charger. Does anyone know exactly how the stock charger works? I'm pretty sure that its just a power supply giving 12.6 volts and either 2 or 4 amps to the battery and the battery itself basically has a balance charger built in. I want to be able to quick charge multiple batteries at once. I can make the plug adapters no problem. Does the amp output matter on the power supply? For example say I want to charge 3 batteries at once, I would need 15 amps of total power from the power supply right?