[bxparks]

Three things prevent me from eliminating all alkalines:

* smoke and CO detectors with low-battery voltage sensors calibrated to alkaline

* some older electronics (e.g. multimeters) using 9V batteries

* my non-contact voltage tester refuses to turn on using NiMH, for safety reasons presumably

[rini17]

There are 9V NiMHs, too. They just need dedicated charger.

[bxparks]

Yeah, most of the devices using 9V are smoke/CO detectors which only accept alkalines. I don't use the few remaining 9V devices enough to justify buying a new charger.