I like the idea of battery acid. It could conduct electricity to PSCN and recive from NSCN. If it gives to NSCN, it could decrease, while if it recives from NSCN, it could get better.
and if it gets at the same time for a long time from PSCN and NSCN it explodes with plasma (in rl it doesnt explode with plasma, but the battery can explode)