RE: My son called today and said his 7 Nimh exploded
I had a NiMh pack catch fire in my airplane while charging. I was able to get the pack out and throw it on the garage floor. The plane was damaged but fortunately i was there or my garage would have caught fire as well. I had left the battery on the floor to cool off, and about 2 hours later, it exploded and blew pieces every where.
There is no really safe battery.
steve