Working on the next iteration of battery usage in my home, after my current 100 packs of alkalines die, I will be going lithium rechargeable. Already got the tip from another dad to make a spreadsheet to track where the rechargeables are deployed.

+100 dad points for competing that upgrade I'm told. No idea which skill tree to deploy them into yet. Heating with miners solved the need for any points in "who touched the thermostat" so I'm due to completely respec my character.