The morning after a losing session, I was on my way to winning when this happen.

I was dealt 1 card.
What the heck "batteries tilt" What's that

This machine was going to give it up, wishful thinking.

So after 20 minutes, yes a full 20 minutes an attendant shows up, "batteries tilt" never seen that one before.
I need to go to the bathroom, I asked. No problem, I need a couple minutes to reboot the machine. phew I go. Returning I notice a group of 6 or 7 suits, mechanics an the attendant at the machine.

"What did I do?" with my hands in the air.

One of the mechanics politely whispers to me that the machine needs battery maintenance and will be hours to repair, but I must finish my current hand then must cash out. However I may play any other machine. I went along with the request, I don't complain much, so I left up $52.50 and went on to win another $200.00 on the craps table. To bad it didn't make up for all the before and after sessions.