Button Battery Cross-Reference: SR, LR, CR and AG Codes

Button batteries carry more than one code, and that creates easy mistakes at the checkout. A watch may show SR626SW, while a packet says 377. A toy may request LR44, while another label calls the same alkaline family AG13 or A76.

This cross-reference guide helps you separate code families, chemistry and physical dimensions before you replace a cell. It also covers the practical issue often missed with car remotes: a new shell is not automatically supplied with a battery or internal electronics.

Read the code engraved on the old cell if possible. If it is corroded or absent, consult the device manual, then measure the diameter and height only after you have found a likely code family.

Read a button-cell label in the right order

Start with the letters and digits, then check the voltage and chemistry. “SR” commonly denotes silver oxide, while “LR” commonly denotes alkaline. “CR” is widely used for lithium cells, but it is not a universal substitute for an SR or LR cell simply because the digits look alike.

Next, compare the diameter and height. A small difference in height can stop a watch back from closing or prevent a spring contact from reaching the cell. Never force a battery into its holder. If it does not sit flat, stop and recheck the code.

• Copy the entire code from the old battery, including letters.
• Check the chemistry requested by the device maker.
• Confirm voltage before installation.
• Compare diameter and height where those figures are available.

Button and watch battery cross-reference chart

Equivalent names can assist a search, but they are not permission to replace every cell with the nearest number. The original code, chemistry and dimensions should agree before you close the device.

Choose chemistry for the device, not the label colour

Silver-oxide cells are commonly used in watches and other small electronics. Alkaline button cells are also used widely in toys, calculators and lights. The practical rule is simple: follow the chemistry specified by the equipment manufacturer or printed on the old cell.

A voltage figure is part of that decision. The watch products in this guide state 1.55V, whereas the AG3/LR41 listing states 1.5V. The difference may appear small on paper, yet a device design can depend on a particular cell type. Do not use a battery merely because it fits the holder.

Do not mix old and new cells in a multi-cell device. Replace cells as a matched set where the device uses more than one, and keep batteries in their original packaging until needed. Store them beyond the reach of children because button cells are dangerous if swallowed.

Installing a cell or servicing a key remote

Work over a clean tray or towel so a tiny screw, spring or battery cannot roll away. Note which side faces up before you remove the old cell. Many holders mark the positive side with a plus sign, but follow the device markings rather than a general rule.

Use a clean, dry tool suited to the battery cover. Avoid bending the contact tab. Once fitted, test the watch, thermometer, toy or remote before replacing all screws. If a remote still fails, check its contacts and internal board before assuming a second new battery is needed.

Key shells deserve special care. Several listed cases are shells only, meaning you transfer the existing electronics, transponder and often the battery. A full remote is different: the Ford listing says its battery is installed. Read the package description before ordering.

Battery and remote-maintenance options

OfficeCatch carries the button cells below, plus remote products that make the battery-versus-shell distinction clear. Match a battery by code; match a shell by its button layout, case shape and the vehicles stated in its listing.

• AG3/LR41 alkaline ten-pack states 1.5V and 7.8mm by 3.6mm dimensions.
• LR44/AG13 multi-code ten-pack names LR44, AG13, 357, SR44 and A76.
• 394 SR936SW silver-oxide cell is also identified as SR936/380.
• SR626SW 377 five-pack lists the 377 and SR66 names.
• Renata SR927SW 395 battery gives 9.5mm by 2.7mm dimensions.
• single SR626SW 377 battery is another option in that stated code family.
• SR616SW 321 silver-oxide battery identifies SR65 and V321 as related names.
• Mazda two-button flip-key shell contains no battery or internal electronics.
• Toyota two-button key-shell pair is supplied without remote electronics.
• Ford BA/BF four-button full remote states that a battery is installed.
• Hyundai four-button remote shell is a replacement case for the models named.
• Hyundai three-button flip-key case is designed for transferring existing internals.
• Panasonic smart-TV replacement remote names TX-49FX650B and TX-55FX650B.
• Holden three-button flip-key shell is a blank replacement case.
• Hyundai i30/i20/Elantra replacement shell is supplied without electronic internals.
• Samsung universal TV remote needs pairing with the TV before use.

Keep a note of the battery code inside a watch box, remote drawer or household manual folder. That record removes guesswork when the next replacement is due.

FAQs

Is LR44 the same as AG13?

LR44 and AG13 are commonly used names for the same alkaline button-cell size family. Product listings may also show names such as A76, 357 or SR44, so check the chemistry and your device manual rather than relying on one alternate code. The size and voltage must still match the original cell.

What is the difference between SR and LR watch batteries?

SR indicates a silver-oxide button cell, while LR generally identifies an alkaline cell. They can share a similar physical size, but chemistry and voltage details can differ. Match the code specified by the watch or device maker, particularly for equipment that needs stable timekeeping or accurate readings.

Which battery replaces a 377 watch battery?

The listings identify 377 with SR626SW and also name SR66, SR626, 177 and 376 as related codes. Check your old cell or instruction booklet before replacing it. The stated dimensions for this family are 6.8mm diameter and 2.6mm height, which helps distinguish it from similar round cells.

Can I put a car key battery into a replacement remote shell?

A replacement shell may not include a battery or electronics. Open the old key carefully and confirm its button-cell code before transferring the battery and internal module. Keep the metal contacts aligned, avoid touching a new cell’s faces unnecessarily, and check whether the key blade needs cutting or programming.