Image of patient that wants to learn more about hearing aid batteries.Batteries are a necessary evil for hearing aid owners. We all know they’re important when it comes to hearing aids, but why? Well, if it wasn’t for batteries, most of us wouldn’t have practical hearing devices. Most likely, we would be limited to using ear horns or need get crafty with extension cords. 

Luckily, batteries do exist; and we have compiled a few frequently asked questions to help you along the way.

How often will I need to change my hearing aid battery?
A standard hearing aid battery lasts from 3 to 22 days, depending on its size. Larger hearing aids use larger batteries, which tend to last longer. Smaller hearing aids, such as in-the-ear devices, use smaller batteries, which have a shorter lifespan.

How do I know when to change the batteries in my hearing aids?

There are several warning signs that let you know your hearing aid battery is low.
• Batteries should be changed if the sound becomes distorted, or you need to turn up the volume higher than normal.
• Some hearing aids will beep when the battery is low. Be sure to switch batteries immediately when you hear the alarm
• To protect against discharging your backup batteries, keep them away from coins, keys and other metal objects.
You should remove dead hearing aid batteries immediately. A discharged hearing aid battery may expand and become hard to remove.

Are there rechargeable batteries?

Most major hearing aid brands now offer a rechargeable hearing aid option.  The hearing aid docking stations can take from a few hours to overnight to charge, but will provide all-day usability - between 18 to 24 hours on one charge.

Are some brands better than others?

Just like the batteries you might purchase for your flashlight, quality matters. If you buy name brand hearing aid batteries, it’s going to last a lot longer than a generic.

A 2013 international study by the Department of Otorhinolaryngology at the University of São Paulo School of Medicine in Brazil tested the accuracy of battery lifespan claims made by various battery production companies. The results are below.

 Average Service1(Hours)= Data from manufacturers' data sheets

Average Service2 (Hours)= Data from the current study

Manufacturer

Size

Average Service1 

(Hours)

Average Service2

 (Hours)

Difference (%)

Renata

#675

560

240

57

#13

440

300

32

#312 

 360

204

 43

#10 

 360

240

 33

Energizer

#675

290

264

9

#13

 310

240

 23

#312

180

156

13

#10

190

252

-33

Duracell

#675

280

372

-33

#13

310

286

8

#312

170

276

-62

#10

180

252

-40

Rayovac

#675

110

252

-129

#13

140

276

-97

#312

140

204

-46

#10

130

276

-112

icellTech

#675

290

240

17

#13

330

240

27

#312

170

204

-20

#10

208

252

-21