New iPad battery issue is a feature not a bug, says Apple
Apple's spoken out against claims that the new iPad's battery displays its charge incorrectly, saying there's no problem at all.
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The battery does continue to charge beyond showing the 100 per cent mark, at which point the iPad will keep charging to its actual 100 per cent point, then discharge slightly and charge back up, repeating these steps until your iPad is unplugged.
Lithium-ion batteries (of the kind used in tablets and smart phones) don't respond well to over-charging, so this mechanism seems to be how the iPad keeps its battery topped up.
"The circuitry is designed so you can keep your device plugged in as long as you would like," Michael Tchao, Apple's vice president of product marketing told AllthingsD. "It's a great feature that's always been part of iOS."
Tchao says you'll get the new iPad's promised 10-hour battery life regardless of what stage in that top-up-and-drain cycle the tablet is at. The decision not to have the battery percentage fluctuating up and down on-screen was apparently made so as not to distract or confuse people using the tablet.
I've been impressed by the last two iPads when it comes to battery life, and Apple's tablet is one of the few gadgets out there that's good at staying alive away from the mains.