Chevron bought Ovonics, the company that was developing NiMH batteries in 1994 for the EV-1. They immediately ordered the company to cease all production of NiMH batteries in anything larger than single cell, "C" size or smaller. Your numbers are for at least 14 years ago for NiMH batteries. They are also not as charge sensitive; lithium batteries are so extremely charge sensitive that there has to be a separate charge controller circuit for each individual cell, or roughly every 1 1/3 volt of battery pack. The fire danger , which the LiMangs are only slightly more stable than Li-Ions, chiefly in percentage of tolerance. In LiIons, in a large pack, if any single cell is lower capacity by as little as 2%, that cell will overheat and catch fire. LiMang can tolerate 3.5- 4% before they catch fire, too. In all the EV-1s leased by GM in 1994, none of them had charging problems, none caught fire, and the range per charge was as much as 200 miles, in what was basically a Saturn. What could they do today, in, say a Honda Fit, or a Nissan Leaf? By the way, NiMH were also the batteries of choice for fleets of electric Ford Rangers, and RAV-4s--- again, with no failures.