Hearing aid batteries last anywhere between five and 14 days depending on the above factors. You will know it's time to replace your hearing aid batteries when the aids start beeping. One solution to save money and make batteries last longer is to purchase rechargeable batteries.
To clarify: you have a main panel with a 60A breaker. That breaker feeds a subpanel which has a 100A main breaker and then some smaller circuit breakers in the sub-panel. If more than 100 coulombs of charge per second flow through the sub-panel main breaker, it will trip and cut power to the subpanel breakers.
The specs on the a/c unit say cooling amperage = 8.8. It's in transit and I will be plugging it into a 15 amp circuit. It will be the only thing plugged into the outlet, but there are other outlets on the circuit into which a tv, cable box and some standing lamps are connected.