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 P4 Panel has unit space for up to 800 amps and fusible switches up to 200 amps. in the Siemens panel family. panel, being able to mix fused switches and circuit breakers. It also contains the new high density 2-pole kit for BL/BQD and xGB breakers saving up to 50% of unit space.