Duracell Hearing Aid Batteries Size 312 (80 Pack): Easier to open packaging is compact, discreet and totally protects your batteries Duracell Activair 312 batteries provide reliable and long-lasting power for your hearing aid Size 312. Hearing aid batteries 312 size in this category replace the following models: 312A, 312AE, 312DS, 312HP, 312HPX 312UP A312, AC312, AC312E, AC312EZ B3124, B347PA DA312H, DA312N L312ZA ME7Z P312, PR312, PR312H, PR41 R312ZA V312, V312HP W312ZA ZA312. Order a box of hearing aid batteries 312 size and receive a free keychain battery holder! (14) 14 product ratings - 4 Packs Duracell Easy Tab Hearing Aid Battery Size 312 Total 96 Batteries. Duracell 16 Pack of DA312B16 Hearing Aid Batteries Expires March 2024. Duracell Hearing Aid Batteries with Easy-Fit Tab, Size 312.
Like any technological device, hearing aids run on batteries. Traditionally, most hearing aids used tiny 'button' batteries that wearers had to change every few days to weeks. Now, though, many hearing aid models come with rechargeable batteries. When choosing a hearing aid, it's a good idea to think through which battery type works best for you.
Size 312 hearing aid batteries are the second-largest and also the second most powerful of all. Represented by the color brown. They give a battery life of about 175 hours. It has to be noted that their size is smaller than size 10 and size 13 batteries and are mainly used for In-The-Canal (ITC) and In-The-Ear (ITE) hearing aids.
Two main types of hearing aid batteries
Rechargeable batteries
Many of the latest hearing aid models come with rechargeable lithium-ion batteries. These batteries are usually recharged at night, when a hearing aid wearer takes out their hearing aids to sleep. So far, rechargeable batteries are generally only available for behind-the-ear styles of hearing aids. Rechargeable hearing aid brands on the market from manufacturers in 2019 included:
Oticon Opn S, Ruby and Play
Phonak Audeo Marvel, Bolero, Naida and Sky
Starkey Livio AI
ReSound LiNX Quattro
Widex Fusion2
More:Pros and cons of hearing aids with rechargeable batteries
Standard disposable batteries
Zinc-air button disposable batteries, also known as 'button batteries,' are the other common option. Because zinc-air batteries are air-activated, a factory-sealed sticker allows them to remain inactive until it is removed. Once peeled from the back of the battery, oxygen will interact with the zinc in the battery and “turn it on.” To get the best performance from a zinc-air battery, wait about one minute after removing the sticker to fully activate before placing it in the hearing device. Replacing the sticker will not deactivate the battery, so once the sticker is removed, the battery will remain in an active state until the power is drained.
Zinc-air batteries remain stable for up to three years when stored in a room temperature, dry environment. Storing zinc-air batteries in the refrigerator has no benefits and could cause condensation to form under the sticker, which could reduce battery life prematurely. Traditionally hearing aid batteries were produced using trace amounts of mercury to assist with conductivity and stabilize internal components, but mercury is no longer used in hearing aid batteries.
(Key: BTE=behind the ear, ITE=in the ear, RITE=receiver in the ear; ITC=in the canal; CIC=completely in the canal.)
Sizes of disposable hearing aid batteries
Hearing aids come in many different sizes and styles and with different power needs. Larger hearing aids require larger batteries. Additionally, hearing aids for people with severe or profound hearing loss typically require more power and larger batteries.
There are five sizes of hearing aid batteries available on the market. The sizes from smallest to largest are: 5, 10, 312, 13 and 675. Size 5 hearing aid batteries are rarely used. The four most common hearing aid battery sizes are all smaller than the diameter of a dime:
Size 10 - 5.8 mm wide by 3.6 mm high
Size 312 - 7.9 mm wide by 3.6 mm high
Size 13 - 7.9 mm wide by 5.4 mm high
Size 675 - 11.6 mm wide by 5.4 mm high
Color-coding for disposable hearing aid batteries
Because size differences may be hard to notice and difficult to remember, battery packaging is color-coded so finding and purchasing the correct ones is easier.
Size 10 batteries - yellow
Size 312 batteries - brown
Size 13 batteries - orange
Size 675 batteries - blue
Battery life for hearing aid batteries
Non-rechargeable hearing aid batteries can last anywhere from five to 14 days, based on a 16-hour day of wear. This is dependent upon the size of the battery and power needed by the hearing aid. Typically, smaller batteries have shorter battery life than larger ones.
The average lifespan of hearing aid batteries is as follows:
Size 10 - three to seven days
Size 312 - three to 10 days
Size 13 - six to 14 days
Size 675 - nine to 20 days
If you are experiencing shortened battery life, there may be an issue with the hearing device. In this case, you should consult your user manual or contact your hearing healthcare professional to make sure everything is working properly.
How to extend the life of a hearing aid battery
While there aren’t any foolproof ways to extend non-rechargeable battery life, these tips will ensure the power isn’t being wasted.
Turn the hearing devices off when not in use and leave the battery compartment door open overnight. Not only will this help keep battery power from being wasted, it will allow any moisture that has built up from the day's use to evaporate overnight.
To get optimal performance from your batteries, always store them at room temperature. Heat exposure and humid environments such as a bathroom will shorten battery life. Also, batteries shouldn’t be carried loose in pockets, a purse or a backpack where they might come into contact with other metal objects like coins or keys that can short-circuit the hearing aid batteries.
More: How to get the most from your hearing aid batteries
Hearing aid battery brands
Common manufacturers of non-rechargeable hearing aid batteries include Rayovac and Energizer. However, many hearing aid manufacturers sell batteries wholesale to hearing care professionals, and the batteries may carry the brand name of that hearing aid manufacturer.
Another common practice is private labeling of batteries. This means the hearing care professional may purchase batteries wholesale and have them labeled with the name, address, phone number and logo associated with their office.
Regardless of the branding, most hearing aid batteries are made by trusted companies that produce other types of batteries for all types of electronics.
Hearing aid battery safety
According to the National Capital Poison Control Center, more than 3,500 Americans of all ages swallow disposable button batteries every year. If this happens to a person or pet in your home, seek medical attention immediately.
More: Hearing aid battery safety and disposal
Where to purchase hearing aid batteries
Batteries are typically available in mass retail stores, pharmacies, grocery stores, electronics stores and through online retailers.
You might also choose to purchase batteries through a hearing aid center near you. Because hearing care providers go through their stock of batteries quickly, many wearers feel they are getting fresher batteries. Also, if you forget what battery size you need for your particular device, the hearing healthcare professional will ensure you are purchasing the correct one.
Additionally, it’s worth asking if your hearing health practitioner offers any kind of battery club or discount program. These programs can save you money on your battery purchases and, in some cases, you can request the batteries be sent directly to you saving you a trip to the office.
LR41, SR41, AG3, 392, and 312 batteries are non-rechargeable button/coin-cell batteries often used in calculators, thermometers, micro LED flashlights, toys, wearable electronics, and similar devices.
LR41, SR41, AG3, 392, and 312 differ not only in their labels, but also in chemistry - they all have similar, but different output voltages, capacities, discharge currents, and other characteristics, ensuring their use in different applications.
LR41, SR41, AG3, 392, and 312 Battery Features and Specifications
LR41, SR41, AG3, 392, and 312 are button/coin-cell batteries featuring physical dimensions of (D x H) 7.9 x 3.6 mm (~0.3110 x 0.1417 inches), while nominal capacity, nominal voltage, and other features depend on the actual battery chemistry.
Button/coin-cell 7.9 x 3.6 mm batteries are commonly labeled according to their chemistry, although some manufacturers use custom labels as well.
LR41 Alkaline Battery
Alkaline button/coin-cell 7.9 x 3.6 mm batteries are cheap and reliable, non-rechargeable batteries that feature a nominal voltage of 1.5 volts, a cutoff voltage of 0.9-1.0 volts, and a nominal capacity of 25-32 mAh, although there are brands that claim a capacity of up to 45 mAh.
Actual capacity significantly depends on the discharge current, age of the battery, and the temperature of the battery.
During discharge, the voltage of the alkaline LR41 batteries drops relatively quickly, thus LR41 batteries are recommended for devices that are not sensitive to the input voltage.
Although the most common label is LR41, other labels are used as well, including LR736 (IEC), AG3, L736, etc.
The shelf life of the LR41 batteries is relatively short - on average 2-3 years.
That is why LR41 batteries are very often replaced by compatible SR41 batteries.
SR41 Silver Oxide Battery
Silver-oxide button/coin-cell 7.9 x 3.6 mm batteries feature a nominal voltage of 1.55V, a cutoff voltage of 1.2V, and a nominal capacity in the 38-45 mAh range.
Silver-oxide batteries also feature much more stable voltage than alkaline batteries and are used for more sensitive devices, including analog and digital watches, measuring devices, calculators, and similar.
Self-discharge rate varies greatly, with some models having ~2% annual self-discharge rate (5-year shelf life), while other models have ~10% self-discharge rate (2-year shelf life).
Another important feature is discharge current - low-discharge SR41 batteries are intended for analog watches and digital watches that don't have alarms and LED lights, while high-drain SR41 batteries are intended for digital watches with alarms and LED lights, and for all other high-drain devices.
On the other hand, the self-discharge rate of the low-drain batteries is lower than the self-discharge rate of the high-drain batteries.
In order to simplify things, some manufacturers offer multi-drain SR41 batteries which combine the best of both worlds - high-drain currents and long shelf life. Such batteries are highly recommended for any device.
Note: Although the most common label is SR41, other labels are used as well, including SR41S, SR41W, SR41SW, SR736 (IEC), SG3, SR736W, SR736SW, 192, 384, 392, and similar.
312 Hearing Aid Battery
Zinc-air button/coin-cell 7.9 x 3.6 mm battery is a non-rechargeable battery mostly used for hearing aid devices.
The most common label of this battery is 312 battery, but other labels are used as well including PR41 (IEC), 7002ZD (ANSI), Brown Tab, ZA312, P312, and similar.
Zinc-air 7.9 x 3.6 mm battery features moist/gel electrolyte which is activated when a protective tab (brown in this case) is removed from the battery - air (oxygen) enters the battery, activating it within few minutes.
Most 312 batteries feature a shelf life of ~4 years at room temperature. When activated, their operating life is measured in weeks, at most - if the operating temperatures are higher and the air is drier, operating life may be at most 3-7 days.
312 batteries feature nominal voltage of 1.40-1.45 volts and cutoff voltage of 1.05-1.10 volts and typical capacity in the 180-185 mAh range, which is significantly more than the LR41/SR41 batteries' capacity.
Can 312 battery be replaced by SR41 battery? In theory, yes, if You don't have a zinc-air 312 battery, You can use an SR41 battery instead.
But, be aware that there is a large difference in capacity (~180 mAh vs ~45 mAh) between these two batteries. Also, zinc-air batteries are designed to provide stronger currents than SR41 batteries, which leads to an even larger capacity difference (when discharged by stronger currents, the actual capacity of SR41 batteries drops) and may lead to reliability issues.
312 hearing aid batteries may be easily ordered from online shops and with fast shipping, they can be at your doorstep within 24/48 hours (depending on your location and/or online store).
Rechargeable 312 Hearing Aid Batteries
312 Batteries Life
Rechargeable 312 hearing aid batteries are 7.9 x 3.6 mm batteries featuring Nickel Metal Hydride (NiMH) chemistry or Silver Zinc (AgZn) chemistry.
NiMH 312 battery features a nominal voltage of 1.2 volts and capacity of 20-23 mAh and is capable of powering most hearing aid devices almost all day long - almost.
Another issue with the NiMH battery is its lower voltage (1.2 volts vs. 1.4 volts) when compared with the Zinc-Air battery that may cause certain devices to shut off too early.
Silver-zinc 312 battery features a nominal capacity of 40-45 mAh (twice of NiMH and very similar to SR41 battery) and is capable of powering almost all hearing aid devices all day long.
However, silver-zinc 312 batteries feature a nominal voltage of 1.8 volts and unless a hearing aid device is specifically designed to support both zinc-air (1.40-1.45V) and silver-zinc (1.8V) batteries, silver-zinc batteries should NOT be used in that particular hearing aid device.
LR41, SR41, 312 Battery Safety Issues
Modern LR41, SR41, 312 batteries don't contain mercury not other heavy metals or toxic pollutants. However, if they get swallowed by kids or pets, they can cause chemical burns due to various electrolytic processes in the body.
If LR41, SR41, 312 battery (or any similar battery) gets swallowed, call the emergency services right away and act according to their instructions.
Long Story Short: If You are looking for a button/coin-cell 7.9 x 3.6 mm non-rechargeable battery for your watch, thermometer, toy, remote, or any similar device, go for silver-oxide SR41 batteries from reputable brands that have many positive reviews - such batteries have been already tested by many users and they work well.
If You are looking for a non-rechargeable 312 hearing aid battery, good Brown Tab batteries should have a nominal capacity of at least 180 mAh and unactivated shelf life of at least 3-4 years.
312 Batteries Spec
Rechargeable 312 hearing aid batteries are available, but they are not used very much. Also, Silver-Zinc 312 batteries feature higher voltage and NOT all devices support such nominal voltage.