Hearing aid batteries 312 size are 7.9 mm by 3.6 mm. They are one of the most common hearing aid battery sizes on the market, used primarily for ITC (in-the-canal), ITE (in-the-ear), and BTE (behind-the-ear) hearing aids. 

Hearing Aid Battery Color Codes – What Color is Size 312? 

Manufacturers will often place letters before or after the size of a hearing aid battery. DieHard, for example, labels their size 312 batteries as PR312. Because remembering the dimensions and different makes of hearing aid batteries can be difficult, there is an industry standard color code for consumers to follow. The main hearing aid battery sizes and their corresponding colors are: 

You can find these color codes on the product packaging, and on the air tab of the hearing aid if applicable. This tab keeps the battery fresh until you are ready to use it. 

How Long Will Size 312 Hearing Aid Batteries Last? 

Hearing aid batteries 312 size will usually last three to 10 days, or an estimated charge of 175 hours. The brand of battery, device, amount of time it is worn, amplification, and environmental factors can all play a role in how long your batteries will last. If your battery life is noticeably and consistently low, the culprit is more likely to be the device and/or usage rather than the battery itself. 

How to Make Hearing Aid Batteries Last Longer 

Even the best effort to extend the life of a hearing aid battery will only go so far. The fact of the matter is that you will need new batteries for your hearing aid often and regularly. However, there are a few things you can do to ensure you’re not wasting battery life: 

  • Do not remove the tab prior to use. 
  • Store hearing aid batteries at room temperature. It is not recommended to refrigerate or freeze them.  
  • Avoid storing batteries in extreme environments. 
  • Keep your batteries away from other metal objects. 
  • Purchase only fresh, quality batteries. 

Hearing Aid Batteries Delivered to Your Doorstep 

Tired of hearing aid batteries being a constant on your to-do list? Join hearOclub and receive long-lasting DieHard size 312 hearing aid batteries every other month—the perfect timeframe to never worry about having fresh batteries on hand again. DieHard batteries are proven to perform as well as or better than other national brands, especially when you know they’re not sitting on store shelves or in your cupboard for who knows how long.  

So, what are you waiting for? Subscribe to hearOclub today