I see where HKJ did a review of these batteries and his conclusion?
NiZn Review by HKJ
_“The cells might be useful for some special applications, but as replacement for alkaline or NiMH they are not very good. The higher voltage might damage equipment and the cells will be damaged when discharged to much.
I do not believe the cells are useable as replacement for alkaline or NiMH_.“
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On the other hand……
If the device I want to use it in has an internal voltage cut off of 1.34v then I would never have to worry about over discharging right?