Packed with features that belie its budget price, the revamped Ring Battery Doorbell is tempting, but its best features will ...

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When stretched by 10 per cent or even folded up, the holey battery design could still resist physical stress and continue to power LED light bulbs – with the stretching and folding experiments ...

The new yarn-like battery could help light up fishing nets, life jackets, or buoys. The battery, developed by Yan Qiao, Zhisong Lu, and their team, uses seawater as a key part of its design.