Interesting Engineering20h
Toaster-like device ends wait for phone charging with quick battery swaps
Swippitt, a toaster-sized unit, allows users to swap a dead phone battery with a fully charged one within seconds.
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Building better batteries: Researchers untangle the tiny strands of lithium that develop inside rechargeable batteries
When we plug in our cell phones to charge them, we take it for granted that they'll soon be brimming with energy for ...