What is the lifespan of the rechargeable battery? May 19, 2022 18:42 Updated The batteries in our rechargeable hearing aids have a lifespan of 4-5 years. Related articles Can I replace a rechargeable battery? How do I charge the VOLT MAX? How long will my hearing aid last? Which program should I use with my VOLT MAX? Is the MDHearing app able to stream music/TV to the hearing aid?