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Betavolt's miniature battery could spell the end of smartphone chargers
(mobilesyrup.com)
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this post was submitted on 13 Jan 2024
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Also, the thickness of the phone:
The power density is about 0.01125m³ per watt. A high end smartphone (snapdragon 8 gen 3 uses 11w of peak power) with a body size similar to Galaxy s23 ultra, would be almost 10 meters thick.