LR43 battery is a non-rechargeable disposable primary battery. LR43 Battery is ideal for watches, alarm transmitters, children’s books, calculators, sugar level detectors, and many other toys and small electronics. This article is going to explain details about LR43 battery, lr43 equivalents, and more info about LR43 battery.
What is “thick” LR43?
“Thick LR43” refers to a specific variant of the standard LR43 button/coin cell battery that has a slightly increased height (thickness) compared to the standard IEC (International Electrotechnical Commission) dimensions for LR43.
- Standard LR43 (IEC Designation: LR1154 or LR43):
- Nominal Voltage: 1.5V
- Chemistry: Alkaline
- Standard Dimensions (IEC):
- Diameter: 11.6 mm
- Height (Thickness): 4.2 mm
- Typical Capacity: ~80-120 mAh
- Common Uses: Calculators, small LED lights, toys, laser pointers, key fobs, some medical devices.
- “Thick” LR43:
- Nominal Voltage: 1.5V
- Chemistry: Alkaline
- Dimensions:
- Diameter: Same as standard LR43 (11.6 mm)
- Height (Thickness): 5.4 mm (This is the key difference – 1.2 mm thicker than standard).
- Capacity: Higher than standard LR43 (typically ~130-180 mAh) due to the larger volume holding more active material.
- Common Designations: This thicker size is often sold as LR43 “High Capacity”, LR43 “Long Life”, or simply LR43 (5.4mm). The IEC designation for this size is LR1142.
Why the Confusion?
Both sizes are often marketed under the name “LR43”.
The thicker version (LR1142) has significantly higher capacity and is often preferred where longer battery life is needed.
Crucially, a device designed for the standard 4.2mm thick LR43 might not have enough physical space to fit the 5.4mm thick version. Always check the battery compartment dimensions before substituting.
Other Names & Equivalents:
Standard LR43 (4.2mm): LR1154, L1154, 1154, AG12, G12, LR43, 186, 301, 384
“Thick” LR43 / LR1142 (5.4mm): LR1142, L1142, 1142, AG13, G13, LR44, A76, 357, 303, SR44 (Silver Oxide – 1.55V, not interchangeable!), 357A, 675 (Hearing Aid – Zinc Air, not interchangeable!)
| Note: When purchasing LR43 batteries, we should pay attention to whether they are thin or thick! |
Key Takeaways:
“Thick LR43” specifically means the 5.4mm tall variant (IEC LR1142).
It has a higher capacity than the standard 4.2mm LR43 (LR1154).
Check your device’s battery compartment! A thick LR43 (5.4mm) will NOT fit in a device designed only for the standard thin LR43 (4.2mm).
When buying replacements, always verify the physical dimensions (diameter and height) listed on the package or in the product specs to ensure compatibility, especially if your device originally had the thicker version.
If your device uses the thicker battery, look for LR1142, AG13, G13, or explicitly “LR43 (5.4mm)” or “LR43 High Capacity”. Avoid standard LR43/LR1154/AG12 if you need the thicker size.