J-Cell Battery Equivalents and Replacements

J-cell batteries are flat, non-rechargeable, 6V batteries intended for a broad range of devices that require a reliable power source that has to be flat and can be inserted only one way into the battery compartment.

J-cell batteries are not the most common batteries on the market, but they can be found at online stores rather easily. Nonetheless, some people use special J-cell battery adapters that can hold four AAAA batteries connected in series, allowing them to replace J-cell batteries with four AAAA batteries.

Updated: April 2, 2024.

J-Cell Battery Features and Specifications

J-cell battery is a flat battery featuring physical dimensions of (H x L x W) 48.5 x 35.6 x 9.18 mm (~1.909 x 1.401 x 0.361 inches), a nominal voltage of 6V, a cutoff voltage of ~3.6V, with a nominal capacity usually between 500 and 650 mAh.

As such, the J-cell battery is commonly used in medical devices, measuring/monitoring equipment, key fobs, remote controls, GPS trackers, security systems, and similar.

Internally, J-cell batteries contain 4 (four) alkaline LR61 batteries, which are very similar to AAAA batteries (8.3 x 42.5 mm; ~0.3268 x 1.6732 inches) connected in series.

Both J-battery terminals are on one side of the battery, with a negative terminal on top of the battery and a positive battery terminal being positioned under a certain angle - this angle and special grooves on the battery prevent the users from placing the battery in the wrong way in the battery compartment.

J-cell battery is also known as 7K67 battery, 4LR61 battery (IEC), 1412A battery (ANSI), 1412 battery, 539 battery, etc.

When replacing the J-cell battery with adapters holding several smaller batteries, be sure that the batteries used by adapters/holders must have proper voltage, capacity, and strong-enough discharge currents in order to replace one J-cell battery.

For example, the Duracell J-Cell Battery (Datasheet PDF) features a nominal capacity of 575 mAh, but in the reality, the exact capacity depends on the battery age, storage and discharge temperature, discharge current, and similar.

J-Cell Battery vs. AAAA Battery

J-cell batteries are non-rechargeable, mostly alkaline batteries that can be rather easily found at online stores and shops, although they are not as common as AAAA batteries.

Also, AAAA batteries are offered in more chemistries and can be found as rechargeable NiCd (not recommended) and NiMH (recommended) batteries:

However, before going for a rechargeable AAAA batteries note that you will need a special battery adapter AND that four rechargeable AAAA batteries have nominal voltage of 4.8V and not 5.0V.

While most devices being powered with 6V J-cell batteries operate well at 4.8V, be sure to check the Owner's Guide of your device and check if it supports the use of four AAAA rechargeable batteries.

Long Story Short: If You are looking for a J-cell battery, also known as 7K67 battery, 4LR61 battery, 1412A battery, or 539 battery, go for the alkaline J-cell battery from one of the reputable brands - these batteries are popular models and already been tested by many users in the real-life situations.

If the battery cannot be found locally (hardware stores, office products, photo equipment stores, etc.), order it from online stores.

For example, Duracell 6V Alkaline J-Battery (Amazon link; the link opens in the new window) is one of the most popular batteries of this size.

Also, don't forget to recycle your old J-Cell battery properly.