Energizer CR1216 Batteries

Energizer CR1216 3V Lithium Coin Batteries

Energizer CR1216 is a thin, 12 mm diameter coin cell designed for very shallow battery bays where space is tight. It provides a steady 3 V output for small electronics that sip power, including slim watches, compact remotes, medical accessories, calculators, and memory backup modules.

Key facts

Parameter	Typical value
Chemistry	Lithium manganese dioxide (primary, non‑rechargeable)
Nominal voltage	3 V
Size	12 mm diameter × 1.6 mm thickness
Typical capacity	Approximately 25 mAh (device- and temperature-dependent)
Operating range	Generally tolerant of normal indoor temperature swings
Storage	Low self-discharge when stored cool, dry, and in original packaging

Best for

• Thin watches and timepieces that require a 3 V, 1.6 mm coin cell
• Compact key fobs and minimalist remotes
• Small medical accessories and diagnostic tools
• Calculators, memory backup, and micro-instruments
• Mini sensors and tags where larger 20 mm coins will not fit

CR1216 vs. CR1220 vs. CR1225

Model	Thickness	Notes
CR1216	1.6 mm	Thinnest; chosen when clearance is extremely tight
CR1220	2.0 mm	Same diameter; more capacity but requires a deeper bay
CR1225	2.5 mm	Highest capacity in the 12 mm family; deepest bay

Only install the exact size specified by your device. Do not stack thinner cells to imitate a thicker model.

Choose this battery if

• Your device, manual, or the old battery is marked CR1216
• The battery compartment is very shallow and designed for 1.6 mm thickness
• You need long shelf stability and reliable startup in a small form factor

Avoid this battery if

• Your device specifies CR1220, CR1225, or a different chemistry/voltage
• The bay allows more thickness and your device calls for a higher-capacity 12 mm coin

Expected runtime

Runtime depends on device design, duty cycle, temperature, and contact condition. In low‑drain devices (timekeeping, memory retention), a CR1216 commonly lasts months. Frequent alarms, lighting, or transmissions shorten life. For critical use (travel, clinical rounds), replace on a schedule rather than waiting for a low‑battery indicator.

Ordering options

• Single or 2‑pack: quick fixes and spares for a watch, remote, or thermometer
• 4–10 packs: households, clubs, and classrooms with multiple small devices
• Bulk sleeves (e.g., 20–25 cells): service counters, jewelers, clinics, and repair teams

Installation steps

1. Confirm size: check your manual or the stamp on the old cell (CR1216)
2. Observe polarity: the flat side is usually positive; follow the device diagram
3. Use proper tools: especially for watch casebacks to avoid damage
4. Clean contacts: wipe pads with a dry, lint‑free swab to reduce contact resistance
5. Seat the cell flat: ensure no rocking and secure the cover fully
6. Test immediately: verify operation before closing up fully, when possible

Storage and handling

• Store cool and dry; avoid heat, moisture, and direct sun
• Keep in original packaging until use to prevent shorting
• Rotate stock first‑in, first‑out; mark receipt dates on sleeves
• Carry a sealed spare if failure would be disruptive (presentations, travel)

Troubleshooting

• No power after replacement: recheck polarity and confirm CR1216 is the specified size
• Intermittent operation: inspect and gently restore contact spring tension; clean pads
• Still failing: reset or re‑pair the device if required by the manufacturer
• Test with a second fresh cell to rule out seating/contact issues

Safety essentials

• Keep coin cells away from children and pets; ingestion can be dangerous
• If swallowed, seek immediate medical attention
• Do not recharge, short, puncture, or incinerate
• Use only the specified size; never stack coins to change thickness
• Recycle or dispose of used cells at approved collection points

FAQ

Is CR1216 the same as a 3 V watch battery?
Not always. Many thin devices use CR1216, but some require CR1220 or a different chemistry. Match the exact code on your device or the old cell.

Can I use CR1220 or CR1225 instead?
No. They are thicker and can damage the battery bay or prevent proper sealing. Use only CR1216 if specified.

How long will a CR1216 last?
It varies by device. Low‑drain applications can run for months; frequent beeps, lights, or transmissions reduce life.

How should I store spares?
Keep unopened cells in a cool, dry place, away from metal objects, and use oldest stock first.

Is CR1216 rechargeable?
No. CR1216 is a primary (non‑rechargeable) lithium coin cell.