364 Watch Batteries

A 364 watch battery is a compact silver-oxide coin cell commonly used to keep smaller timepieces and low-drain devices running. It has a nominal voltage of 1.55V and measures approximately 6.8 mm in diameter by 2.1 mm thick, making its small, flat shape suitable for watches with limited room inside the case. With a capacity of roughly 20 mAh, this type of battery is designed to provide a steady flow of power for analogue watches, selected digital watches, calculators and certain small medical tools. Silver-oxide construction is valued for its consistent voltage output, which can help a watch maintain dependable timekeeping as the battery’s charge decreases. The 364 designation may also appear alongside equivalent or cross-reference codes, including SR621SW, SR60, E364, V364 and D364. Some packaging may also reference AG1 or LR621, although those codes can indicate alkaline versions rather than silver-oxide cells. Because batteries with similar dimensions are not always identical in chemistry or performance, checking the code printed on the old cell, the watch manual or the manufacturer’s specifications is an important step before ordering. A battery that looks close in size may not deliver the same service life, voltage stability or fit. If a watch has stopped unexpectedly, is losing time, or has a dim display, replacing the cell with the correct 364 specification may restore normal operation. Keeping a spare on hand can also be helpful for a frequently worn watch, a travel watch kept in a suitcase, or a treasured timepiece that is brought out for special occasions. For a broader selection of compatible sizes, you can also browse 395 Watch Batteries.

Choosing the right 364 battery is about more than matching a number on the package. Consider the device first, then confirm the battery type, voltage and dimensions. A classic watch worn every day may benefit from a reliable silver-oxide cell that supports stable operation, while a digital model with additional functions should be checked against its stated battery requirements before purchase. When replacing the battery, clean hands and a clear, well-lit workspace can make the process easier, especially because these cells are small enough to disappear against a dark tabletop or roll beneath a piece of furniture. Avoid touching both flat sides unnecessarily, and take care not to bend the delicate contacts inside a watch case. Some watches have a screw-back cover, while others use a snap-on cover or require a specialised tool; if the case is water-resistant, opening it may affect the seal, so professional replacement can be the sensible choice. Never force a cell into place, and do not combine an old battery with a new one or mix different battery chemistries in the same device. Keep loose batteries away from children and pets, store them in their original packaging until needed, and follow the instructions provided with the watch or device. A 364 watch battery can make a practical, thoughtful addition to a gift for someone who wears a traditional watch, collects timepieces, relies on a desk calculator, or keeps a small device ready for everyday tasks. It is especially useful as part of a drawer of household essentials: the kind of item that is easy to overlook until a familiar watch stops ticking before work, a family gathering or a trip. With the correct code and careful handling, these compact batteries offer a convenient way to maintain the devices that help mark appointments, routines and memorable moments throughout the year.