If you have a Raspberry Pi project that you want to take on the go, you have a few different options for power. Here are the choice available.
Learn how to make a simple lemon battery and use it as an emergency phone charger in this hands-on science experiment. Watch ...
A blast from the Elektor archives: this 1998 battery tester uses a simple LED display to reveal a battery’s true condition under load — even below 1 V.
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