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Q&A How much margin due to charging inefficiency should I add when calculating the size of batteries needed for a trip?

The overall efficiency from a power bank to a smartphone battery is about 2/3, according to this source: https://www.powerbankguide.com/powerbank-capacity-explained/ The amount of energy a batte...

posted 5y ago by Jasper‭  ·  last activity 5y ago by System‭

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