CR2354 battery: equivalents & specs
The CR2354 is a tall 3 volt lithium coin cell, 23 mm across and 5.4 mm high, holding about 560 mAh. It is best known from Polar heart-rate monitors, bike computers and appliance timer-backup circuits, and it is often confused with the CR2450.
Same battery, other names
Every code below is the exact same cell as CR2354. Any of them will fit and work identically.
Compatible replacements
- CR2450: Similar capacity, 1.5 mm wider and 0.4 mm shorter; NOT interchangeable, and the CR2354 has a recessed negative terminal.
⚠️ Never fit a CR2354 in a device that charges its own cell, such as a solar keyboard. Those are designed around a rechargeable ML type, and charging a primary lithium cell risks rupture.
Buying and replacement notes
The trap with this cell is the CR2450, which looks nearly identical and shares its capacity class. The CR2354 has a distinctive stepped or recessed base on the negative side, and devices designed for it use that geometry for contact. A CR2450 forced into a CR2354 holder either fails to seat or stresses the contacts. Panasonic is the reference manufacturer.
Commonly used in
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⚠️ Keep away from children. Swallowed button batteries, especially 20 mm lithium coins, cause severe injury within hours. If a child swallows one, call the 24/7 National Battery Ingestion Hotline (US) at 800-498-8666 or poison control at 800-222-1222 immediately. What every parent should know.