Renata CR2025 (Lithium Coin)

Renata CR2025 3V Lithium Coin Battery

The Renata CR2025 is a primary lithium manganese dioxide (Li‑MnO2) coin cell sized 20 mm x 2.5 mm. It delivers stable 3 V power for slim, low‑drain devices such as car remotes, fitness sensors, calculators, and small electronics. The cell is mercury-free and designed for long shelf life.

Key specs

• Chemistry: Li‑MnO2 (primary, non-rechargeable)
• Nominal voltage: 3 V
• Size: 20 mm diameter x 2.5 mm height
• Typical capacity: 150–170 mAh (at low drain, 20–25°C)
• Operating temperature: approximately −30°C to +60°C
• Shelf life (sealed): typically 5–10 years at room temperature
• IEC designation: CR2025

When to choose CR2025

• Choose if your device or manual specifies CR2025.
• Good for slim devices that need more runtime than CR2016 but cannot fit CR2032.
• Best for low- to moderate-drain use (e.g., occasional pulses, average loads under ~0.2 mA).
• Avoid if the device calls for a different size (e.g., CR2032) or a rechargeable coin cell (e.g., LIR2025).

Common uses

• Car key fobs and keyless entry remotes
• Fitness sensors and heart-rate straps
• Bike computers and small remotes
• Calculators, small toys, and LED indicators

Typical runtime expectations

• Key fob: about 1–3 years depending on usage, signal strength, and climate
• Small remote or LED device: roughly 6–24 months
• Calculator or sensor (intermittent use): about 2–5 years

CR2025 vs. CR2016 vs. CR2032

Do not substitute based on diameter alone. A CR2032 may not fit a CR2025 holder, and a CR2025 in a CR2032 holder can be loose and unreliable.

Compatibility notes

• Also labeled as: CR2025; brand variants include DL2025 (Duracell) and ECR2025 (Energizer).
• BR2025 exists (different chemistry with better high‑temp stability but lower current capability); use only if the device allows it.
• LIR2025 is a rechargeable 3.6 V nominal coin cell and is not interchangeable with CR2025.
• Non-rechargeable primary cell; never attempt to recharge.
• Do not mix old and new cells or different brands/chemistries in the same device.

Installation and handling

• Match the code on the old battery or your device manual (CR2025).
• Observe polarity: the + side typically faces up in most holders.
• Avoid shorting the cell; handle with dry hands. Use plastic tweezers if available.
• If contacts look dull, gently wipe them with a dry lint-free cloth before installing.
• Replace all identical cells in a device at the same time if multiple are used.

Troubleshooting and replacement cues

• Signs of a low battery: reduced remote range, dim/erratic LEDs, or devices resetting.
• Cold weather can temporarily reduce output; if performance drops in the cold but recovers indoors, the cell may still be usable but nearing end of life.
• If measuring with a multimeter, a fresh cell typically reads around 3.0–3.2 V open-circuit. Many devices struggle below about 2.6–2.8 V.

Storage, safety, and disposal

• Store in original packaging in a cool, dry place (10–25°C); avoid heat and direct sunlight.
• Button/coin cells are a severe ingestion hazard for children and pets. Keep out of reach; seek immediate medical attention if swallowed.
• Tape both sides of used cells before disposal to prevent shorting and reduce ingestion risk.
• Recycle through local battery collection programs; do not incinerate.

FAQ

• Can I use a CR2032 instead of a CR2025? Only if the device explicitly allows it. CR2032 is thicker and may not fit; CR2025 will have shorter runtime than CR2032.
• Are all CR2025 batteries the same? Size and voltage are standardized, but capacity and performance vary by brand and storage conditions.
• How long will a CR2025 last in a key fob? Commonly 1–3 years depending on use, temperature, and signal strength.
• Which way does the battery face? The + side usually faces up; confirm with the holder markings or manual.
• Is the Renata CR2025 rechargeable? No. CR-series coin cells are single-use; never attempt to recharge.