Hey guys , have a three year old white macbook, never had any problems with anything until I left it in my car overnight last week (which I've done before without incident). Now my battery won't charge but the laptop works when its plugged into the power supply. I swapped batteries with my brothers laptop and his battery works fine in my laptop, so the battery is the problem. Anyone ever heard of this happening before? Is this just a case of new battery or is there some way of fixing it?