A Size 94 battery is typically the LR94 coin cell: a small alkaline button battery about 9.5 mm in diameter and roughly 2.6–3.0 mm tall.
What is a Size 94 battery?
In battery catalogs, the label “Size 94” refers to the physical dimensions of the cell rather than a device-specific requirement. The standard alkaline version is LR94, and the same size in silver-oxide chemistry is SR94. These cells share the same outer footprint but differ in chemistry, voltage behavior, and performance characteristics. A fresh LR94 provides about 1.5 volts, while an SR94 provides about 1.55 volts per cell.
Specs and equivalents
Here are the core specifications and common references you may encounter when shopping for a Size 94 cell:
- Designation: LR94 (alkaline button cell).
- Voltage: 1.5 V per cell for alkaline LR94; SR94 (silver-oxide) is ~1.55 V when fresh.
- Diameter: approximately 9.5 mm.
- Height: approximately 2.6–3.0 mm.
- Common cross-refs: SR94 for the silver-oxide version of the same size; verify with vendor specifications.
Because tolerances and labeling can vary by manufacturer, always confirm the exact dimensions and chemistry before purchasing to ensure a proper fit in your device.
Common uses
Size 94 cells are favored for compact electronics where a tiny, flat power source is required. Typical applications include small remote controls, calculators, toys, and other handheld devices that need a single, compact 1.5-volt cell. They are chosen for their slim profile and compatibility with devices that require a small coin-shaped battery rather than a larger round cell.
Replacement and compatibility tips
To replace a Size 94 battery confidently, follow these guidelines:
- Check your device’s manual or the current battery that came with it to confirm the exact chemistry (alkaline LR94 vs. SR94) and voltage.
- Measure the battery housing or the old cell’s diameter and height to match the ~9.5 mm x 2.6–3.0 mm footprint.
- Buy from reputable brands and verify that the listing specifies LR94 (alkaline) or SR94 (silver oxide) as appropriate.
- When replacing, avoid mixing chemistries in devices designed for a single type, as voltage and discharge characteristics differ.
With careful verification, a Size 94 replacement restores device performance without risk of damage from a mismatched battery type.
Compare with other small coin cells
For context, here is how Size 94 compares to other common small coin cells by diameter and typical use:
- LR41: 7.9 mm diameter, 3.6 mm height; alkaline; 1.5 V. Used in small watches and compact gadgets.
- LR44: 11.6 mm diameter, 5.4 mm height; alkaline; 1.5 V. Common in calculators and toys.
- CR2032: 20 mm diameter, 3.2 mm height; lithium; 3.0 V. Widely used in keyboards, computer motherboards, and devices needing longer life.
Understanding these dimensions helps prevent fit issues when shopping for replacements or considering alternatives for a given device.
Summary
The Size 94 designation identifies a small coin-shaped battery, typically LR94 in alkaline chemistry or SR94 in silver oxide, with a diameter of about 9.5 mm and a height near 2.6–3.0 mm. Always confirm the chemistry, voltage, and exact dimensions shown on your device or packaging, since labeling can vary by brand. When in doubt, measure the battery slot and compare with standard specs, or consult the device manufacturer to ensure a proper, safe replacement.