Motorola phone has been dead for years because I lost it, (no exaggeration here at all!), I recently found my phone but couldn't find the charger. However; looking at the charging port on the side of the phone, it is the same size as a PS3 controller charger cable, so I plugged it into the computer and my phone, then my phone turned on!! I thought I had actually made it work at first but it won't turn on fully. Will it charge more if I keep it plugged in? Or will it cause damage?