Panasonic CR2025

Panasonic CR2025 3V Lithium Coin Cell

The Panasonic CR2025 is a primary (non-rechargeable) lithium manganese dioxide coin battery sized for slim, compact devices. It provides a steady 3V output and dependable performance for everyday electronics such as car key fobs, watches, fitness sensors, calculators, and motherboard/RTC backup.

Specs at a glance

Chemistry	Li-MnO2 (Lithium Manganese Dioxide)
Nominal voltage	3V
Typical capacity	160–170 mAh (approx. 165 mAh)
Size	20 mm diameter × 2.5 mm height
Weight	~2.5 g
Operating temperature	-30°C to +60°C (-22°F to +140°F)
Shelf life	Up to 8 years (proper storage)
Mercury	Mercury-free

When to choose the CR2025

• Use if your device specifically calls for CR2025 or any of these equivalents: DL2025, ECR2025, KCR2025, 5000LC, SB-T14.
• Use when space is tight and a 2.5 mm thick cell is required (e.g., slim remotes, wearables).
• Use for low-to-moderate drain loads with intermittent pulses (key fobs, watches, sensors).

Avoid or check alternatives if

• Your device needs a thicker cell (CR2032, 3.2 mm) for longer life or higher pulse loads.
• Your device specifies rechargeable LiR2025 (different chemistry/voltage behavior).
• Continuous operation above 60°C is expected—consult the device manual for BR-series options.

Estimated runtime by device type

Actual life varies with load, duty cycle, and temperature. These estimates assume fresh cells and typical usage:

Quartz watch (low drain)	3–5 years
Car key fob / remote entry	1–2 years
Heart-rate chest strap / fitness sensor	6–12 months
Motherboard/RTC backup	2–5 years
Small LED tealight	20–40 hours (continuous ON)

For medical devices, follow the manufacturer’s guidance and replace only with the specified part number.

Compatibility and cross‑references

CR2025 shares size/voltage with these common markings: DL2025 (Duracell), ECR2025 (Energizer), KCR2025, 5000LC, SB-T14. Always confirm the battery code printed inside the device or in the manual.

CR2025 vs alternatives

CR2025	20×2.5 mm, ~165 mAh, general use in slim devices
CR2032	20×3.2 mm, ~220–240 mAh, longer life but thicker—fits only if the holder allows
BR2025	20×2.5 mm, carbon monofluoride chemistry; better high‑temp stability, lower current capability
LiR2025	Rechargeable; different voltage profile—use only if specified by the device

Installation and handling

1. Power off the device. Open the battery compartment.
2. Note polarity. Slide out the old cell without bending contacts.
3. Insert the new CR2025 with the + side facing the marked + in the tray.
4. Clean light oxidation from contacts with a dry cotton swab if needed.
5. Close the compartment and test the device.

Tips to maximize life

• Buy recent stock; avoid mixing old and new cells or different brands.
• Store spares in original packaging, 15–25°C, low humidity; avoid heat and sunlight.
• Remove the battery from devices stored long‑term to prevent slow drain.

Safety and recycling

• Button batteries are a choking and ingestion hazard. Keep out of reach of children and pets. If swallowed, seek immediate medical help.
• Do not recharge, crush, or short‑circuit. Do not expose to fire or temperatures above 60°C.
• Use child‑resistant packaging when available and secure battery compartments.
• Recycle used cells at battery collection points; do not dispose of in fire or household trash where restricted.

FAQ

Is CR2025 the same as DL2025 or ECR2025?

Yes. DL2025 and ECR2025 are brand-specific names for the same size and chemistry as CR2025. Check voltage (3V) and dimensions (20×2.5 mm) to confirm.

Can I use a CR2032 instead of a CR2025?

Only if the device allows the extra 0.7 mm thickness. For most slim holders, CR2032 will not fit or can stress contacts. Use the size specified by the device.

How long will a CR2025 last in a key fob?

Typically 1–2 years with normal use. Cold weather, frequent locking/unlocking, and weak signal areas can shorten life.

Why did my new battery read low immediately?

Possible causes include contact oxidation, incorrect polarity, a high-drain device not suited to CR2025, or a depleted/older stock cell. Clean contacts and verify the exact battery type specified.

How should I dispose of CR2025 batteries?

Use local battery recycling programs or retail collection bins. Tape terminals before recycling to prevent short circuits during transport.