I have a low-power device (2mA max), wherein my NiMH batteries tend to leak. Following the advice of How do I prevent batteries from leaking?, I now have Low Self-Discharge batteries; however, they still leak when in this device. Why can this be?
I suspected this might be due to overdischarging before being put in the charger; however, the battery that leaked today measured 1.16V when taken out, so this is not why.
I have other ideas of why this can be (e.g. I have to hit the device to get the battery to pop out; maybe the reason is purely mechanical?); however, I don't want to lose a battery for every idea that turns out to be wrong.
What are other reasons NiMH batteries can leak in such a scenario? I would like some opinions, so I can assess which of those are likely, and test the most likely ones first.
p.s., I have all sorts of battery test equipment; so if some idea of yours would require something, you can assume I have it.