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 BR2020B100V is a 100 amp main breaker with 20 spaces and 20 circuits. It is a value pack for the cost conscious home owner or contractor. The value pack consists of the load center (and cover) plus 5-1P 20A and 1-30A 2P circuit breakers. Amperage Rating: 100A. Bus Material: Aluminum.