How best to charge an iPad

Mac Format - - APPLE TALK -

I re­cently bought an iPad Air, which I am very pleased with, but I am hav­ing trou­ble get­ting it to recharge prop­erly. Of­ten, when I plug it into my iMac it will show that it isn’t ac­tu­ally charg­ing at all. On my com­puter at work, it charges, but only very slowly. I can charge it re­ally quickly from the mains, of course, but I don’t want to have to carry the adapter with me ev­ery­where. Am I do­ing some­thing wrong? Why pro­vide a USB charg­ing ca­ble if it doesn’t work on USB? Sonya Car­ron The mains adapter pro­vided with your iPad is the 12W model that sup­plies enough power to charge an iPad. The smaller, slim­line plug adapter is the 5W model that is only rated for the iPhones and the first-gen­er­a­tion iPad mini. This will charge the other iPads, but more slowly. It’s when you plug your iPad into the USB port of a com­puter that things get con­fus­ing. Most USB ports sup­ply a max­i­mum of 500mA. This isn’t enough to charge the iPad when it is in use, so it dis­plays ‘Not Charg­ing’ next to the bat­tery icon. When the iPad is turned off (al­to­gether or just its screen) it charges, al­beit slowly. Macs with USB 3.0 can sup­ply up to 900mA to Ap­ple de­vices plugged into those ports, but only if the Mac is switched on and not in sleep mode.

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