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Hands-on Flattening of Power Packs

WE HAVE A mobile test centre set up in the back seat of our car where we inflict stress on mobile phones greater than that experienced in blending experiments. Today we figured out a way to flatten a Lumia extended power grip.

The yellow case around the test handset in the photo has on-board power that can extend the Lumia 1020's life by 20 hours. But when a 6yo plays a game that incorporates a physics engine followed by 30 minutes of zooming around the world with Here Maps, all power-saving considerations go out the window.

When 6yo Mia returned the Lumia 1020 to me, she mentioned how it was "getting hot". The handset's warm housing did not cool down for 30 minutes. When I powered up the 1020 a few hours later, I saw it had less than 40% power. And the phone's snap-on power was down to one bar (out of four bars when fully charged).

I don't intend to deep-discharge the Lumia 1020's battery during normal use but I'm sure our mobile field tester will have similar testing episodes during the months ahead.