Last night we were sent an interesting report about Tesla Roadsters falling into an unfortunate state -- a very terminal, very expensive state. According to theunderstatement a Tesla Roadster that is left to discharge completely, a process that could take many weeks, will need to have its entire battery pack replaced (pictured above) -- at a cost of approximately $40,000. There are said to be no countermeasures that can prevent this short of keeping your car topped up, and while that may sound simple enough, it becomes tricky if you need to put the thing in storage for a few months