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I just bought a New Trent IMP99D external battery, to keep my phone alive while gaming during long-haul flights. It has two USB ports to connect to, one which supplies 1 amp at 5 volts, another which supplies 2 amps at 5 volts. The instruction manual says to connect smartphones to the 1-amp port, and any iPad 2's to the 2-amp port. Is there any harm, or do I incur any inefficiencies, if I connect my iPhone 4S to the 2-amp port instead of the recommended 1-amp port? | ||||
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When I travel, I only bring my iPad charger and use it interchangeably with my iPhone 4 without noticing any battery life performance and by that extension it should be the same for iPhone 4s. Apple's website seems to confirm this; For the 10W USB iPad charger - "It also charges iPhone and all iPod models with a dock connector." | |||
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It should be fine, the iPhone has built in safeguards and using the iPad charger wont incur any real damage | |||
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