Today's good deed: Saving a customer from a spicy pillow.
After putting it back together sans battery, it complained during POST about an off-brand battery being installed & warning knock-offs can do what the on-brand battery was so clearly doing. The HP didn't complain about a missing battery. Good job, HP!
Aside from the date/time being wrong, it responded to the pressure relief by working normally, showing a well-behaved screen, & passing the keyboard fox test without issue.