So, yesterday I received in the post, a brand new Star u9501, based on the mtk6589 quad-core CPU. The phone came with two batteries, which is an added bonus. The issue however, is that the battery drains with the charger plugged in, unless it's turned off, then a battery indicator appears and it tells me it's charging. If the battery is drained too much, the red power/charging LED doesn't even illuminate when plugged into the charger, the phone sits there like a dead fish, and I wonder if it's ever going to function again. Last night I got a 100% charge out of it, turned it on, left it on the charger overnight, and woke up late with yet another dead battery. A combination of chargers, cables, and batteries hasn't been successful. So, all in all, the charging is very erratic and/or problematic, or I'm doing something wrong, which I can't imagine. Sometimes if I leave the battery out for a few hours, and the place it back in for charging it seems to have a little bit of kick just to get the on-screen indicator up and running, but I can't guarantee this is successful, the phone or batteries could very well be at fault.