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How to Light a light bulb with a potato battery

Following on from Edison's first lightblub moment back in 1879, the OU's Stephen Serjeant experiments with an alternative power source - the humble potato. Create a potato batter with a couple of screws and a light bulb.

Apple's iOS 26 and iPadOS 26 updates are packed with new features, and you can try them before almost everyone else. First, check our list of supported iPhone and iPad models, then follow our step-by-step guide to install the iOS/iPadOS 26 beta — no paid developer account required.

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