Yeah my ipad does the same when plugged into my CD player. If in use and plugged in, in a full day will gain about 10% charge. I just make sure it is charged before I leave home and then it stays 100% the whole time.
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here is one darren on ebay
http://www.ebay.com.au/itm/Dual-USB-...cAAOSwQYZW0YOe
Yes & there are plenty out there which claim to ouput 2.1A which don't! The one I fitted into my second glovebox for charging my Ipad3 doesn't even provide sufficient power to maintain it's charge status when being used, it only slows down the discharge rate. It will recharge if the ipad is not being used. And it wasn't a cheapie either.
and the problem with that one is you don't know which one is assigned with 2.1amp and which is 1amp. and it will be assigned! Tricky bastards. Id love to find a double 2.1amp output each side. something with more would be great too.
One of the better mods I've seen lately what made you think of that position ??
http://www.ebay.com.au/itm/5-1A-High...3D291541586443
How do they work out 5 amps is it all three combined??