Maxell CR1216 Battery (3V Lithium Coin Cell)

The Maxell CR1216 is a thin, 3V lithium coin cell designed for very compact, low‑drain electronics. Its 1.6 mm height fits tight battery compartments while delivering consistent voltage for precise devices such as slim watches, calculators, select medical tools, and memory backup.

Quick specs

Model	Maxell CR1216
Chemistry	Lithium Manganese Dioxide (Li‑MnO2)
Nominal voltage	3 V
Typical capacity	~25 mAh
Dimensions	12.0 mm diameter × 1.6 mm height
Weight	~0.6 g
Operating temperature	−20 °C to +60 °C
IEC designation	CR1216

When to choose this battery

• Use if your device explicitly specifies CR1216 and has a 1.6 mm battery bay.
• Best for very low‑drain loads (e.g., quartz timekeeping, memory backup) that need steady 3V output.
• Avoid if your device calls for CR1220/CR1225 or larger cells—thickness must match.
• Avoid for medium/high‑drain or high‑pulse devices (bright LEDs, frequent wireless transmissions).

Compatibility and equivalents

Also seen as CR1216 (IEC), DL1216 (Duracell), or ECR1216 (Energizer). Always match the code on your old battery or device manual. The positive terminal is the flat top side.

Typical applications

• Slim analog/digital watches
• Calculators and small remote key units (select models)
• Digital thermometers and compact diagnostic tools (as specified)
• Memory/RTC backup in small electronics

Expected runtime (estimates)

• Quartz watch (~1–2 μA): roughly 1.5–3 years.
• Calculator (~5–10 μA average): months of continuous-on time; typically 1–2 years with intermittent use.
• Memory backup (sub‑μA): multi‑year support depending on standby current.

Actual life varies with device current, temperature, and battery age.

Alternatives (if your device supports them)

• CR1220 (12×2.0 mm, ~35 mAh) and CR1225 (12×2.5 mm, ~50 mAh) offer more capacity but are thicker and not interchangeable unless specified.
• BR1216 (poly‑carbon monofluoride) may be preferred for very low‑drain at elevated temperatures; check the manual.

Replacement steps

1. Power off the device and open the battery compartment carefully.
2. Note orientation; the “+” side usually faces up.
3. Remove the old cell without shorting the terminals (avoid metal tweezers).
4. Insert the new Maxell CR1216 in the same orientation; ensure it seats flat.
5. Close the compartment and test the device. For watches, confirm the gasket is clean and intact.

Storage and handling

• Store in original packaging at room temperature in a dry place.
• Keep away from metal objects to prevent short circuits.
• Do not mix old and new cells or different types in the same device.

Safety and recycling

• Button/coin cells are a swallowing hazard. Keep away from children and pets. If swallowed, contact Poison Control (US: 1‑800‑222‑1222) and seek immediate medical care.
• Do not recharge, disassemble, crush, or incinerate.
• Tape terminals of used cells and recycle through approved programs; do not dispose of in household trash.

CR1216 vs. similar sizes

Type	Diameter	Thickness	Typical capacity	Notes
CR1216	12 mm	1.6 mm	~25 mAh	Fits ultra‑slim devices
CR1220	12 mm	2.0 mm	~35 mAh	Thicker; only if specified
CR1225	12 mm	2.5 mm	~50 mAh	Thicker; only if specified

FAQ

Can I use a CR1220 or CR1225 instead of a CR1216?

No. They are thicker and generally will not fit correctly. Always use the size specified by your device.

Is CR1216 rechargeable?

No. CR‑series lithium coin cells are non‑rechargeable. Charging can cause leakage or rupture.

How do I confirm that CR1216 is the right size?

Check the code on the old battery or the device manual. The “1216” indicates 12.0 mm diameter and 1.6 mm thickness.

How should I dispose of a used CR1216?

Tape the terminals and recycle through a battery recycling program. Do not throw coin cells in household trash.