Quote:
Originally Posted by HarryT
Just as connecting an iPad to a standard 5W USB port will not usefully charge it, but will prevent it from discharging.
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I'm pretty sure that many of the Apple devices, such as the iPhone, iPad and macbook pro, will sense if it's connected to power and if so, will use that rather than the battery. I generally use a mophie powercase with my iPhone and that tends to keep the internal battery from being worn down over time. I use to do it with iPads, but I haven't been able to find a battery case for the iPad in a number of years.