Simple Potential Difference Question

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SUMMARY

The discussion clarifies the differences between a 12V car battery and a 9V radio battery. A 12V car battery consists of 8 cells connected in series, each producing approximately 1.5V, allowing it to deliver significantly higher currents. In contrast, the 9V radio battery typically contains 6 cells, utilizing a dry chemical composition that limits its current output. The car battery's wet cell design facilitates rapid chemical reactions and reversibility, unlike the dry cell construction of the 9V battery.

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Can someone help me to describe the differences between a 12V car battery and a 9V radio battery. They both convert chemical energy into electrical energy, but the car battery has the capacity for much higher currents with similar voltage to the 9V.

Thanks
 
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The 12V car battery is made with 8 cells in series, each about 1.5 V ...
How many cells do you think a 9V "transistor radio" battery has in it?
Cut one apart lengthwise, if you want to check your expectation.

Car batteries are usually "wet", the chemical reactions can occur quickly (and are more easily reversed); 9V battery cells are "dry" (moist paste)
 

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