I picked up an Energizer bunny battery from Sams.
Don't forget to leave your frunk open! I place a piece of styrofoam OVER the front latch so it cannot shut. Also, that reminds me to re-connect the battery.
Don't be afraid to disconnect it/replace it. Just do it right! I have disconnected my battery at least 30 times doing "upgrades".
@Paul - Didn't know about the eGas thing….does it reset itself by itself? Because I have not been performing that particular step. Any downside or does egas system re-adjust?
Learn something new everyday!