My HP67 Has Melted!!!

[BillBee]

I've seen Lithium Ion battery packs melt - (mostly off brand replacement batteries for cordless tools). NiCd seem to be a less sensitive to the critical temperature point where melt down starts to happen. Li ones can take more charge the hotter they get and perpetuate the problem. An EE guy would know the internal structure and about what can shift internally causing it.

Makita chargers, for example, have a temp cut off for the NiCd batteries.

My rule is to always keep an eye on rechargeables.

Glad all is good except for the door.

-B