Motorola E815 / E816 Hollywood

So I'm looking into getting the E815 through Verizon and the only thing that concerns me is the low battery beep (at least I hope that's the only problem). I used to have a phone that only beeped once before dying. That beep *always* happened about 3 am when I'm 50 feet away from the phone and was extremly annoying waking me up. So I hear this thing is like a smoke detector where it beeps every couple minutes with a low battery and can't be shut off, that sounds like it could drive me nuts.

I've seen on eBay these things that have "overcharge protection" for chargers. So do these things work? Can I just leave my phone plugged in all the time at home with those types of chargers and not have to worry about the low battery beep or problems with the amount of talk time I get on a battery?

I know its good to sometimes empty the battery just for conditioning, that won't be a problem when I get on a long call that takes it down.