TAKING THE CPA EXAM ................................................................................... 12. Problems at a Prometric Testing Center.............................................................
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.
Example: You want to calculate how many days a battery will last in an ITE instrument using a 312 size battery. You have measured the Battery Drain at .75 ma and we will use the default Battery Capacity from the table above which is 130 mah. We will assume the user is wearing the hearing aid 16 hours per day.