- Are They Interchangeable? No. While both share an identical 11.6mm diameter and 1.5V alkaline chemistry, their critical 2.4mm thickness gap prevents safe substitution. Using an LR54 in an LR44 compartment causes loose terminal contact, power dropouts, or spring damage in sensitive electronics (see comparison chart below).
- Exact Physical Dimensions: LR44 measures 11.6mm × 5.4mm; LR54 (LR1130) measures 11.6mm × 3.0mm. Always check your device compartment depth before purchasing.
- Direct Cross-Reference Equivalents: LR44 = AG13, A76, 357, SR44, L1154. LR54 = AG10, 189, LR1130, SR1130, V10GA.
- Typical Device Usage: LR44 powers digital calipers, laser pointers, and medical devices. LR54 powers ultra-slim watches, pocket calculators, and compact fever thermometers.
| Specification | LR44 | LR54 (LR1130) |
|---|---|---|
| Dimensions (Dia × Thickness) | 11.6 mm × 5.4 mm | 11.6 mm × 3.0 mm |
| Nominal Voltage | 1.5 V alkaline | 1.5 V alkaline |
| Common Cross-Reference Codes | A76, AG13, 357, SR44, GPA76 | LR1130, AG10, 189, 389, SR1130 |
| Typical Capacity | ~110–150 mAh (higher capacity) | ~65–80 mAh (slimmer profile) |
| Physical Interchangeability | ❌ NOT interchangeable — LR44 is 2.4 mm thicker and will not fit LR54 compartments | |
Can I replace LR54 with LR44? No. Although both button cells are 11.6 mm wide and supply 1.5 V, an LR44 is 5.4 mm thick while an LR54 is only 3.0 mm thick. The LR44 may stop the battery cover closing or damage the contacts. Use the size printed on the old battery or in the device manual.
LR54 is 100% interchangeable with AG10, LR1130, 189, 389, and V10GA (11.6mm × 3.0mm, 1.5V). Never force an LR44 (5.4mm) into an LR54 slot—the extra 2.4mm thickness bends contact terminals or prevents battery covers from latching.
Buying in Singapore? After confirming the size, shop alkaline batteries in Singapore with local stock and fast delivery. For the code differences, use this button-battery cross-reference guide.
LR44 vs LR54: key differences
LR44 and LR54 are alkaline button cells with the same diameter and nominal voltage, but their different thickness and capacity make them physically incompatible in most devices. LR44 is common in calculators, toys, laser pointers and kitchen scales. The slimmer LR54 is used in watches, compact lights and other low-profile electronics. If you're not sure whether your device even takes an alkaline cell or a lithium one, see our guide: Alkaline vs Lithium Coin Cell: What's the Difference?
LR54 Battery Equivalents: AG10, 189, LR1130 & Swap Rules
| Battery | Common equivalent names | Size |
|---|---|---|
| LR44 | A76, AG13, LR44H, 357, SR44, LR1154 | 11.6 mm × 5.4 mm |
| LR54 | LR1130, AG10, 189, 389, SR1130 | 11.6 mm × 3.0 mm |
| LR41 | AG3, 192, 392, SR41 | 7.9 mm × 3.6 mm |
| LR43 | AG12, 186, 386, SR43 | 11.6 mm × 4.2 mm |
| LR45 (Not Stocked) | AG9, 394, 194, LR936, SR936SW | 9.5 mm × 3.6 mm |
| LR55 (Not Stocked) | AG8, 191, LR1120, V8GA, 391, SR1120W | 11.6 mm × 2.05 mm |
- Physical Fit Verdict: No, you cannot swap them. Even though both batteries share an identical diameter of 11.6mm and output 1.5V alkaline power, their thickness difference is dramatic: LR44 is 5.4mm thick, while LR54 is only 3.0mm thick (a 2.4mm difference).
- What Happens If You Put an LR44 into an LR54 Slot: The battery will physically jam. Forcing the compartment lid shut will crush internal plastic latches or bend metal spring contacts permanently out of shape.
- What Happens If You Put an LR54 into an LR44 Slot: The 2.4mm gap prevents the terminal from touching the contact plate. The battery will rattle loose inside the chamber, causing intermittent power cuts or complete failure to turn on.
- Correct Equivalents to Buy: If your device calls for an LR54, buy an AG10, 189, LR1130, V10GA, or 389. If it calls for an LR44, buy an AG13, A76, 357, or LR1154.
Equivalent codes must match the same physical size and chemistry. A76 and AG13 identify the LR44 format; LR1130 and AG10 identify the LR54 format; AG3 identifies the LR41 format; AG12 identifies the LR43 format. Similar voltage alone does not make two button cells interchangeable.
LR54 Battery Equivalent: Complete Cross-Reference & Replacement Guide
If your device specifies an LR54 battery, you do not need to hunt exclusively for the LR54 label. Manufacturers worldwide stamp different alphanumeric codes on the exact same 11.6 mm × 3.1 mm button cell form factor. Any battery bearing the equivalent designations below is a direct, 100% interchangeable drop-in replacement.
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What about LR44H? (LR44 vs LR44H Explained)
If you are replacing a dead battery inside a digital caliper, laser pointer, electronic thermometer, or miniature toy, you may see LR44H stamped on the metallic casing instead of standard LR44. This frequently leads buyers to wonder if they require a specialized replacement.
- Are LR44 and LR44H interchangeable? Yes, 100%. They share the exact same physical dimensions (11.6 mm diameter × 5.4 mm height) and output the identical 1.5V nominal voltage.
- What does the "H" mean? The suffix "H" is commonly adopted by manufacturers (such as Tianqiu, Camelion, and various Asian battery OEMs) to denote High drain or heavy-duty, mercury-free zinc-manganese alkaline chemistry. It indicates the battery is optimized for devices with steady or pulsed current draw (such as digital measuring tools with LCD backlights).
- Can you replace LR44H with standard LR44? Absolutely. Any genuine brand-name LR44, A76, AG13, or 357 cell (such as our in-stock Panasonic LR44 or GP LR44) fits the compartment perfectly and powers the device without issue.
LR41 and LR43: the smaller and mid-size cousins
LR41 is the smallest of the four, at 7.9 mm × 3.6 mm and 1.5 V. It is common in quartz watches, small thermometers, calculators, laser pointers and pen-style flashlights. Its most widely sold equivalent is AG3, also labelled 192 or 392, all the same physical size and chemistry.
LR43 sits between LR54 and LR44 in thickness, at 11.6 mm × 4.2 mm and 1.5 V. It appears in cameras, calculators and some watches that need slightly more capacity than an LR54 but do not have room for a full LR44. Its direct equivalent is AG12, also sold as 186 or 386.
None of LR41, LR43, LR44 or LR54 should be substituted for one another based on voltage alone; all four are 1.5 V, but four different thicknesses. Always match the code printed on the old cell, or the size specified in the device manual.
What about LR45? (LR45 vs LR44)
A frequent search query from buyers is whether the LR45 is related to or interchangeable with the LR44. They are not interchangeable:
- Dimensions: The LR45 (also designated AG9, 394, 194, or LR936) measures 9.5 mm in diameter and 3.6 mm in thickness. By comparison, the LR44 is 11.6 mm in diameter and 5.4 mm in thickness.
- Fitment: Because the LR45 has a 2.1 mm smaller diameter, it will rattle loose or lose electrical contact inside an LR44 compartment. Conversely, an LR44 cannot physically squeeze into a 9.5 mm tray designed for an LR45.
- Common Uses: LR45 cells are typically found in ultra-compact wristwatches, digital timers, laser pointers, and medical instruments.
What about LR55? (Real Battery vs Typo & Fitment Explained)
Searches for LR55 are frequent and typically fall into one of two situations: either an accidental keyboard typo for the popular LR54 or LR44, or a search for a real, standardized button cell. Here is how to tell them apart and avoid purchasing the wrong battery:
- The Common Typo (LR55 vs LR54 / LR44): On standard keyboards, the "5" key sits directly adjacent to "4". Buyers intending to search for LR54 (or LR44) often type "LR55" by accident, or misremember the numerical designation. Always verify the stamped code on your existing battery or the device battery door.
- Yes, LR55 is a Real Battery: An LR55 is a genuine standardized 1.5V alkaline button cell (also designated AG8, 191, LR1120, V8GA, or 391/381 in silver oxide).
- Physical Dimensions: The LR55 shares the exact same 11.6 mm diameter as the LR44, LR43, and LR54, but measures only 2.05 mm in thickness. By comparison, an LR54 is 3.05 mm thick and an LR44 is 5.4 mm thick.
- Fitment & Compatibility: Because the LR55 is 1.0 mm thinner than an LR54 and 3.35 mm thinner than an LR44, it will not sit securely or maintain electrical spring tension in an LR54 or LR44 compartment—it will rattle loose and disconnect. Conversely, an LR54 or LR44 is far too thick to fit into an LR55 slot. Never interchange them.
- Common Uses: Genuine LR55 / AG8 / 191 cells are primarily found in ultra-slim wristwatches, digital calipers, miniature penlights, and pocket laser pointers.
LR54 Battery Explained: Dimensions, Equivalents & Where It Is Used
The LR54 battery (also widely known by its IEC code LR1130 or manufacturer code AG10 / 189) is one of the most common compact 1.5V alkaline button cells. While it shares the exact same 11.6mm diameter as the popular LR44, it is substantially slimmer at just 3.05mm height (compared to LR44's 5.4mm thickness).
All Cross-Reference Equivalents for LR54:
If your device manual or old battery is labeled with any of the following model numbers, an LR54 battery is an exact 1:1 replacement:
- Alkaline Codes: LR54, LR1130, AG10, 189, V10GA, L1131, RW89, GP189, KA54.
- Silver Oxide Equivalents: SR1130, SR1130W, SR1130SW, 389, 390 (Silver oxide cells deliver 1.55V with a flatter discharge curve and higher capacity, ideal for precision wristwatches).
Common Devices That Use LR54 Batteries:
Because of its slim profile, LR54 / LR1130 is specifically engineered for electronics where an LR44 is simply too thick:
- Digital Medical Thermometers & Timers: Many oral and forehead thermometers use a single LR54 to keep the battery chamber compact.
- Pocket Calculators & Desk Clocks: Slim solar/battery backup calculators (Casio, Sharp, Canon) frequently take LR1130 / AG10 cells.
- Analog Watches & Precision Instruments: Quartz watches requiring a thin cell without adding bulk to the case back.
- Laser Pointers & Mini LED Toys: Specialized ultra-compact keychains and novelty lights.
How to choose the correct button cell
- Read the code stamped on the old battery.
- Check the device manual or battery-compartment marking.
- Match both diameter and thickness—not voltage alone.
- Do not force a thicker cell into the compartment or stack thinner cells.
You can select the exact size from our Panasonic 1.5 V alkaline button-cell listing, or browse the full range on our Alkaline Batteries page.
Frequently asked questions
Are LR44 and LR54 interchangeable?
No. They have the same diameter and nominal voltage, but LR44 is 2.4 mm thicker (5.4 mm vs 3.0 mm). Stacking LR54 or forcing LR44 into an LR54 slot can damage device contacts.
Is LR1130 the same as LR54?
Yes. LR1130, LR54 and AG10 commonly refer to the same 11.6 mm × 3.0 mm alkaline button-cell size.
Is A76 the same as LR44?
Yes. A76 and AG13 are common names for the 11.6 mm × 5.4 mm LR44 alkaline button cell.
Do LR44 and LR54 have the same voltage?
Both are nominally 1.5 V alkaline cells, but their different thickness and capacity mean one should not replace the other.
Is AG3 the same as LR41?
Yes. AG3, 192 and 392 are common names for the 7.9 mm × 3.6 mm LR41 alkaline button cell.
Is AG12 the same as LR43?
Yes. AG12, 186 and 386 are common names for the 11.6 mm × 4.2 mm LR43 alkaline button cell.
Can I use LR41 or LR43 in place of LR44 or LR54?
No. All four are 1.5 V alkaline cells, but each has a different thickness: LR41 is 3.6 mm, LR54 is 3.0 mm, LR43 is 4.2 mm and LR44 is 5.4 mm. Swapping one for another can leave the battery loose, stop the compartment closing, or cause poor contact and reduced runtime. Match the exact code on the old cell or the size stated in the device manual.
What can I use as a substitute for LR54?
The direct substitute is the same 11.6 mm × 3.0 mm cell sold under the names LR1130 or AG10. Do not substitute an LR44, LR43 or LR41, since all three are thicker and will not fit or seat correctly.
What is a good replacement for LR44?
A76 and AG13 are the standard alkaline replacements, since they are the same 11.6 mm × 5.4 mm cell under different brand names. A silver oxide SR44 (357) is also the same physical size and can be used for a steadier voltage and longer runtime, at a higher price.
What is an alkaline button cell battery?
An alkaline button cell is a small, flat, round 1.5 V battery used in watches, calculators, toys and other low-drain electronics. LR44, LR54, LR41 and LR43 are all alkaline button cells that share the same voltage but differ in diameter or thickness.
What is an LR54 battery and what are its equivalents?
An LR54 battery is a 1.5V alkaline button cell measuring 11.6mm in diameter and 3.05mm in height. Common direct equivalent codes include LR1130, AG10, 189, V10GA, L1131, and GP189. Silver oxide equivalents include 389, 390, and SR1130W.
Can I replace an LR54 with an LR44?
No. An LR44 is 5.4mm thick—almost 77% thicker than the 3.05mm LR54. Attempting to insert an LR44 into an LR54 slot will jam the battery contacts or prevent the battery door from closing.
Can I use an LR45 instead of an LR44?
No. An LR45 (AG9 / 394) has a 9.5 mm diameter and 3.6 mm thickness, while an LR44 is 11.6 mm by 5.4 mm. The LR45 is too narrow to sit firmly in an LR44 battery slot and will cause power connection failures. Please note that DigiStoreSG does not stock LR45 cells; we carry genuine in-stock LR44, LR54, LR43, and LR41 button cells.
Is there a difference between LR44 and LR44H batteries?
No physical or electrical difference. Both LR44 and LR44H are 1.5V alkaline button cells measuring 11.6 mm in diameter and 5.4 mm in thickness. The "H" suffix is used by certain manufacturers (such as Tianqiu) to denote "High drain" performance. Standard genuine LR44, AG13, or A76 batteries are 100% plug-and-play compatible replacements for any device specifying LR44H.
Are LR and AG batteries the same?
Yes, they refer to the same types of 1.5V alkaline button cells, but use different naming conventions. "LR" is the international standard defined by the IEC (where "L" stands for alkaline chemistry and "R" denotes round cylindrical or button form factor). "AG" (Alkaline Generic) is the widely used commercial designation originally introduced by Asian battery manufacturers. For example, LR44 is AG13, LR54 is AG10, LR41 is AG3, and LR43 is AG12.
Is AG10 the same as LR44?
No. AG10 is the equivalent code for an LR54 (11.6 mm diameter × 3.05 mm thickness), whereas LR44 is an AG13 (11.6 mm diameter × 5.4 mm thickness). While both have the same 11.6 mm round diameter and 1.5V voltage, an AG10 / LR54 is 2.4 mm thinner than an LR44 and will rattle loose without making electrical contact in an LR44 compartment.
What is the difference between LR54 and SR54?
The primary difference is battery chemistry: LR54 is an alkaline cell (1.50V), while SR54 (also sold as 389, 390, or SR1130W) is a silver oxide cell (1.55V). Both have the exact same dimensions (11.6 mm × 3.05 mm). Silver oxide cells maintain a steady, flat voltage curve throughout their life and have higher energy density, making them the preferred choice for quartz wristwatches. Alkaline LR54 cells are more economical and ideal for digital medical thermometers, calculators, and toys.
Is LR55 a typo for LR54, and can I use an LR55 instead of LR54 or LR44?
Many searches for "LR55" are accidental keyboard typos for LR54 or LR44. However, LR55 is also a real 1.5V button cell (equivalent to AG8, 191, LR1120, and 391 silver oxide) measuring 11.6 mm × 2.05 mm. They are not interchangeable: even though LR55 shares the same 11.6 mm diameter, it is only 2.05 mm thick—far too thin to make spring contact in an LR54 slot (3.05 mm) or an LR44 slot (5.4 mm). DigiStoreSG does not stock LR55 cells, but carries genuine in-stock LR54, LR44, LR43, and LR41 batteries ready for fast Singapore delivery.
Beyond button cells, DigiStoreSG stocks genuine cylindrical alkaline and rechargeable battery solutions with fast Singapore local dispatch:
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