If you have one, especially with a case/cover that has a magnet built in to it operate the Fire’s on/off switch, never put any electronic device on top of it – there’s every chance it’ll turn the Fire on and run the battery down.
In my case, the TV remote was enough to do it overnight. When I picked it up this morning the Fire was warm and the battery down to 26% so it had obviously been on all night, even though the cover was closed and should have been off. I’m sure the remote somehow overrode the cover’s magnet and turned on the Fire.
Obviously it’s not a massive problem – just keep other gadgets away from it, especially when packing for travelling. You could, of course, use the built-in on/off button – that should solve the problem.
If you’re thinking of buying one, the high-speed charger is worth getting. It’s not worth the cost, I must say that, but what is these days? Without it, using any other USB charger (not iPad**), or your PC, the damn thing will take half a day to recharge – possibly. There’s no way of knowing if it’s charged, or even charging, as there’s no indicator light – you have to open it up, start it, and check the battery gauge to see how it’s doing, and for such a half-arsed design there is absolutely no excuse.
**Possibly not anyway – there no indication of power output on the high-speed charger – no information of any kind, in fact and I’m not sure that’s even legal. Every charger I have has its input and output printed on it, as well as other info relating to its power consumption. The Fire charger has nothing at all. The iPad charger puts out 10W, double what a computer USB port puts out. The Amazon charger clearly puts out more than 5W, but how much more is a secret, presumably so no-one is tempted say sod it, and use their iPad charger instead. Is it worth the risk? No, I’d say not, though I strongly suspect there is no risk.
Sooner or later someone with more electronic know-how than me will test the thing, and Amazon’s cover will be blown.
UPDATE: Amazon’s website actually gives the output as 9W – and do I feel foolish! I’m still not convinced that it’s as fast claimed though, so watch this space.
By the way, the charger has taken over an hour to increase the battery’s charge by 20%, High-speed my pale, white, arse!