so what

20040423

just enough ELECTRICAL WIRING to impress your man

All batteries are 1.5 volts. Ds, Cs, AAs, AAAs, all of them. Even a watch battery has the same voltage as a big D: 1.5 volts. (Of course, if they are smaller, they can't hold as much electricity, so they wear out faster.) What about the 9-volt battery with the little snaps on top? Inside there's 6 little batteries. 6x1.5=9 volts.

Car batteries are 12 volts. (Yes, there are 8 smaller batteries inside.) If your car battery was dead, you could run over to 7-11, hook up 8 D's in a long column, and that might work!

If your radio needed a D, but you only have a AAA, you can connect the AAA + to + and the - to -, and it would work, but not as long. If your radio takes a watch battery, but you only have a D, you could hook it up, and have it last much much longer than the watch battery.

Car batteries are 12 volts. (Actually they are mostly a special kind now and there's not 8 cells inside.) Car batteries are rechargeables, and they get charged while you're driving.

if you ever ...

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