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Rachargeable Batteries

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Bigears49 | 18:31 Wed 27th Mar 2013 | Technology
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Why are rechargeable AA and AAA batteries only rated at 1.2 volts when they replace 1.5 volt disposable batteries?
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Avatar Image Buenchico
Because you can't change the laws of physics (or should that be chemistry?).

The chemical reaction which takes place inside a NiMH cell only produces a potential difference of just over 1.2V, whereas the chemical reaction inside a Zinc Chloride battery provides a p.d. of about 1.5V.
19:16 Wed 27th Mar 2013
Avatar Image Old_Geezer
They should squeeze 1¼ cells into each battery :-)
20:27 Wed 27th Mar 2013
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