It seems, with the help of a 9-volt battery, wire, crocodile clips, and wet sponges, you can increase your brain's performance and, more importantly, return your brain to its younger, more ...

A 9 Volt battery has about 500 mA of capacity typically, ... If you wire this circuit incompetently you can get hot on both terminals, and it still appears to work correctly.

Cars, trucks, RVs, and motorhomes run dual 12-volt batteries for various reasons. Depending on how you wire a two-battery 12-volt system, the result can be a 12-volt system or a 24-volt system ...