Plug power in, Sansa goes dead and overheats.

This is my 4th to burn out this way.  It has not been the same charger.  Twice from two different car adapters, once from a wall (phone) charger.  I don’t recall the first time it happened.  I have seen this online.

http://forums.sandisk.com/t5/Sansa-Clip-Sansa-Clip/sansa-clip-won-t-turn-on-but-heats-up/td-p/154101

http://forums.sandisk.com/t5/Sansa-Clip-Sansa-Clip/Sansa-clip-overheating/td-p/140414

And the chargers that the clips were attached to have worked fine with them before.  Only other thing I can think of is perhaps that I plugged them in while the clips were on.  I recall that happened with two of them; I was attempting to “top off” the battery.

I’ll try to keep that in mind with the ones I have left, but it would be nice to have a confermation of some problem/solution.