Maxell CR1225 Lithium Coin Cell (3V)

The Maxell CR1225 is a compact, non-rechargeable 3V lithium manganese dioxide (Li‑MnO2) coin battery sized 12 mm in diameter and 2.5 mm thick. With a typical capacity of 45–50 mAh and low self‑discharge, it reliably powers small, low‑drain electronics where space is limited.

At a Glance

When to Choose the CR1225

• Use if your device explicitly calls for “CR1225” or “1225.” Typical in watches, small medical tools, calculators, memory backup, sensors, and compact remotes.
• Choose for low to moderate pulse loads (µA standby with short pulses up to ~10–20 mA).
• Avoid if your device needs rechargeable cells (e.g., LiR1225) or sustained high current; consider the specified rechargeable type or a larger coin cell (e.g., CR2032) if supported.

Compatibility Notes

• Equivalent labels: CR1225, DL1225 (Duracell), ECR1225 (Energizer), IEC 5012LC.
• BR1225 vs CR1225: BR (poly-carbonmonofluoride) tolerates higher temperatures and very low drain with better long‑term stability but has lower capacity and poorer pulse performance. Use the chemistry your device specifies.
• Do not substitute different thicknesses (e.g., CR1220 at 2.0 mm or CR1216 at 1.6 mm) unless the device manual confirms compatibility. A thicker or thinner cell can cause poor contact or damage.
• Not rechargeable. Never mix old and new cells, or different brands/chemistries in the same device.

Real‑World Runtime Examples

Actual life varies by load, temperature, and duty cycle. These estimates assume a ~50 mAh cell at room temperature:

• Quartz watch (~2 µA): roughly 2–3 years.
• Small sensor (~10 µA): roughly 6–8 months.
• Key fob/remote (µA standby, short 10–20 mA pulses): often 1–3 years of typical use.

Installation Guide

1. Power off the device if possible. Open the battery compartment with the recommended tool.
2. Note polarity before removal; the “+” side usually faces up.
3. Insert the new CR1225 with the correct orientation; avoid touching both faces with bare fingers to reduce contamination.
4. Close the compartment securely and verify operation.

Storage, Handling, and Safety

• Store in the original packaging in a cool, dry place. Keep away from metal objects to prevent short circuits.
• Button/coin cells are hazardous if swallowed. Keep out of reach of children and pets. If swallowed, seek immediate medical attention or call a poison control center.
• Tape over the terminals of spent cells before disposal to reduce ingestion and short‑circuit risks.

Environmental Disposal

Recycle used lithium coin cells at approved collection sites. Do not incinerate or dispose of in household trash.

Common Alternatives by Size

FAQ