The question of just how long hearing aid batteries should be expected to last is not as simple to answer as it seems, because battery performance hinges on a large number of factors. Battery life depends on the model of your hearing aid, and may vary widely even in models produced by the exact same manufacturer. The life span of a hearing aid battery also depends on the amount of time the hearing aid is powered on. As you would expect, the more you use the hearing aid, the more rapidly the batteries will deplete.
The batteries themselves are a major factor. Batteries the exact same size from different manufacturers will have different lives. And there will be variation within one battery manufacturer if they offer premium or extended-life lines. Some hearing aid batteries will not start to deplete their stored energy until they are plugged into a hearing aid that is turned on, and some (such as zinc-air batteries) will start to burn power the moment you remove the adhesive covering on the bottom of the battery, and will continue to decline in power even if the hearing aid is not on.
Because the cost of batteries adds up, if you’re looking for a new hearing aid, you should do some research to see which types and models of hearing aids have the best battery life, because that may influence your decision. Similarly, a little time invested in research may help you locate better batteries for your existing hearing aids. Fortunately, when shopping for hearing aid batteries, the companies that manufacturer them have made things a lot simpler for you by standardizing their sizes and color-coding each size; the exact same color codes are used by all hearing aid battery manufacturers. The following list of battery life is estimated, of course, but it should give you a basic idea of how long batteries of each size should last:
- Size 10 – Yellow – 80 hours
- Size 13 – Orange – 240 hours
- Size 312 – Brown – 175 hours
- Size 675 – Blue – 300 hours
To ensure the longest life for your batteries when they are in the hearing aid, turn the device off when you’re not wearing it. Store your unused hearing aid batteries at room temperature, indoors, and in their original, unopened packaging to ensure their longest possible life.