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What have got the criteria needed to be met for using a charger for your cellphone?
I think it just has to be the right voltage, and DC, right? I have multiple different USB chargers, and they all are 5V DC, but put out a multitude of different currents (0.4A - 2A). Am I correct that all those can be used interchangeably, but the greater the current the proportionally faster the charge?