Button cell and coin batteries power a huge range of everyday devices – from watches and car key remotes to calculators, toys, thermometers, and medical devices. They come in a range of sizes and chemistries, each identified by a code (such as CR2032, LR44, or SR626SW) that tells you exactly which battery you need.
Check the battery compartment of your device or the old battery itself for the code, then match it to the right replacement. Not sure what you need? Give us a call and our team can help identify the right size for your device.
NOTE: Products in this section are button cell and coin cell batteries. For watch-specific battery options, see our Watch Batteries range.
Understanding Button Battery Codes (CR, LR, SR)
The letters at the start of a button battery code tell you the chemistry, which affects how long it lasts and what devices it suits:
| Prefix | Chemistry | Characteristics | Common Uses | Example Codes |
|---|---|---|---|---|
| CR | Lithium | Long shelf life, stable voltage, performs well in cold | Key fobs, car remotes, medical devices, cameras | CR2032, CR2025, CR2016 |
| LR | Alkaline | Cost-effective, good for low-drain devices | Toys, calculators, small remotes | LR44, LR41, LR1130 |
| SR | Silver Oxide | Flat discharge curve, highly accurate voltage output | Watches, precision instruments | SR626SW, SR44, SR920SW |
The numbers that follow the prefix indicate the battery's physical dimensions (diameter and height in mm). For example, a CR2032 is 20mm in diameter and 3.2mm tall.
Common Uses for Button & Coin Batteries
Button cells are used across a wide range of everyday devices. Here’s a quick guide to help you find the right match:
| Watches | Car remotes & key fobs | Toys & small electronics | Thermometers & medical devices | Calculators & digital scales | Cameras & electronics |
|---|---|---|---|---|---|
| Most analogue and digital watches use silver oxide (SR) cells for their accurate, stable output. Common sizes include SR626SW, SR44, and SR920SW. | Typically use lithium CR batteries. CR2032 is the most common, though some vehicles use CR2025 or CR2016. Check your car manual or the old battery for the correct code. | Often use alkaline LR batteries such as LR44 or LR1130. These are cost-effective and widely available. | Glucose monitors, digital thermometers, and hearing aids commonly use CR or SR batteries requiring consistent voltage output. | Generally run on LR or CR batteries. Check the battery compartment for the code. | Some compact cameras, laser pointers, and remote controls use lithium CR cells for their high energy density and long shelf life. |
