Button cells are useful for all sorts of smaller or low-power devices, but are ones that are the same diameter, like a CR2025 ...

I had a co-worker tell me that he had an old computer that the "trickle charger" died on him, thus causing his CMOS to die and screw up his BIOS. I have never heard of anything like a "trickle charger ...

I would be inclined to say "no" re: crashing, but I'd try to clear CMOS, redo the settings, and see if it helps. Otherwise, no clue ...