what is power bank?
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A Power Bank is a portable charger designed to recharge your electronic devices when you're on the move. Ranging in size from slim, pocket-sized devices up to larger, higher-capacity Power Banks – they can be used to charge smartphones, tablets etc.
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A battery charger, or recharger, is a device that provides electricity to convert into stored chemical energy for storage in an electrochemical cell by running an electric current through it. The charging protocol depends on the size and type of the battery being charged
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