How do I set up dual 12 volt batteries?

Answer Serial ConnectionConnect the negative terminal of the first 12 volt battery to the positive terminal of the second 12 volt battery. Connect the positive terminal of the first battery to the positiv... Read More »

Top Q&A For: How do I set up dual 12 volt batteries

Can you use two 12-volt batteries wired in series with a 12-volt trolling motor?

No. Wiring in series stacks the voltage being delivered. Two 12-volt batteries in series deliver 24 volts, which causes permanent damage and a fire hazard in a 12-volt trolling motor. Wire the batt... Read More »

Is there anywhere where I can get a 12-volt car plug to recharge 9-volt batteries?

Is it okay to connect a 3.7 volt li-ion (900mAh) and a 3.7 volt li-ion (1000mAh) batteries in parallel?

I don't recommend doing it. Before that, though, if you're trying to increase the mAh rating, then parallel connection of two identical voltages will do what you want. Voltages in series will add... Read More »

How to Charge Two 6 Volt Batteries on a 12 Volt Starter?

Charging two 6V batteries with a 12V starter is a very simple task so long as the batteries are equal in their amp-hour rating. The batteries will need to be configured in a series configuration i... Read More »