Oh, here's another great one I've been dealing with off and on. Power supplies that can not keep up with the power demands of their respective devices. I can have my phone plugged in with a fully charged battery and it will stay that way no matter what I do. Once I use it some while unplugged, especially when I get below 80% battery, plugging it back in will sometimes just maintain the current level at best, and often times the charge will keep going down (albeit at a lower rate). It's been so bad that leaving the phone screen off and not touching it would still show a power draw. I could tolerate some lower end devices that don't charge the battery when actually running on AC power. It's not even being able to do that that ticks me off. I don't care if I'm playing a game on a wifi network with a GPS fix running and making a call through my bluetooth, all at the same time. Being able to run a phone at max power while plugged in without drawing down the battery should be standard #1. I don't know if this happens with other phones, but mine is an LG Optimus Android. Otherwise it's a great little phone and this doesn't become an issue too often. Just enough to be irritating.
And in case anyone is wondering, both my mate's phone and mine suffer from this since brand new, so the chances of being a bad battery are nill. By that same token, I know I can't power on the phone on AC alone. It requires the battery to be inserted. Which makes me wonder what will happen if/when that battery does go bad and wont hold a charge at all.