Which Battery is Better: C or D?
Most recent answer: 10/22/2007
In an electrical circuit or device, there are 2 really important things. One of them is voltage. The other is current. The classical way you hear them talked about is by comparing them to a pipe with water in it. The voltage is like the water pressure which pushes things down the pipe. And current is like the amount of water flowing down the pipe. Some electronics need lots more current but dont need more voltage.
Thats where the batteries come in. The D cell batteries can give more current than the C batteries. If you needs lots of current and try to get it from a tiny battery, it wont work as well.
As for adding them together, youll notice that in most electronics, you put them in so that the positive end of one touched the negative of the other. That adds the voltages of the batteries. This is called adding them "in series". So if you have 2 D batteries in series, you have 3 volts.
(published on 10/22/2007)
Follow-Up #1: Batteries in series vs. parallel
- John (age 17)
Staten Island, NY, USA
(published on 05/11/2008)
Follow-Up #2: battery for low-current circuit
- John (age 50)
Most circuits are just fine with a big battery at the right voltage. The resistance of the circuit automatically limits the current when the right voltage is applied.
Occasionally there's a slightly different situation. Some of those cheap plug-in DC supplies that come with electronic devices are designed to put out the right voltage only when hooked to a device that drains the right current. If the drain is too low, the voltage drifts up some. Batteries aren't like that, however. Their maximum voltage is just a little above the rated voltage, well within the tolerable range for the circuit.
posted without vetting until Lee returns from the Serengeti
(published on 10/28/2014)