Maxell CR1632 Battery

Maxell CR1632 3V Lithium Coin Cell

The CR1632 is a compact 3V lithium manganese dioxide (Li-MnO2) battery used in devices that call for a 16 mm diameter and 3.2 mm height cell. Choose it when your device explicitly specifies CR1632 for reliable, space‑efficient power.

At a glance

• IEC code: CR1632
• Voltage: 3 V
• Typical capacity: about 120 mAh
• Dimensions: 16 mm diameter x 3.2 mm height
• Chemistry: Lithium manganese dioxide (primary, non‑rechargeable)
• Operating temperature: -20 to +60 °C (device dependent)

Best for

• Car key fobs and remote starters
• Small sensors and wearables that specify CR1632
• Bike computers, HR straps, and sport accessories that require CR1632
• Calculators, digital thermometers, and compact remotes

Use if / Avoid if

• Use if your device manual or the old battery label says CR1632.
• Use if you need a slim 3.2 mm coin cell with stable 3 V output for low to moderate intermittent loads.
• Avoid if your device specifies another size (for example CR2032, CR2025, CR1620) or a rechargeable coin cell (labels like LIR/ML/LI).
• Avoid for high‑drain continuous loads (bright LEDs, motors); choose a cell designed for higher currents instead.

Compatibility and alternatives

Match the exact code. Same diameter does not mean interchangeable—thickness and capacity differ, and most battery compartments are size‑specific.

Battery	Diameter	Thickness	Typical capacity	Notes
CR1620	16 mm	2.0 mm	~70 mAh	Thinner; usually not secure in a CR1632 slot
CR1632	16 mm	3.2 mm	~120 mAh	Use when device specifies CR1632
CR2016	20 mm	1.6 mm	~90 mAh	Larger diameter; will not fit 16 mm holders
CR2032	20 mm	3.2 mm	~220 mAh	Same thickness but larger diameter; typically incompatible

Expected runtime

• Car key fob: about 1–3 years with typical use and standby drain
• Small sensor that transmits periodically: about 6–18 months, depending on duty cycle and temperature
• Calculator or simple clock: often 1–2 years

Actual life varies with device current draw, usage frequency, and cold weather performance.

Installation steps

1. Power off the device if possible and open the battery cover carefully.
2. Note polarity before removal; most CR coin cells install with the positive (+) side facing up.
3. Remove the old cell and inspect contacts; if needed, gently clean with a dry lint‑free cloth.
4. Insert the new CR1632 in the same orientation; avoid touching both faces with bare fingers.
5. Close the cover securely. For water‑resistant fobs, check the gasket for proper seating.
6. Test the device; some remotes may require re‑syncing after battery replacement.

Storage and handling

• Store in original packaging, in a cool, dry place away from metal objects.
• Do not mix new and used batteries in a device.
• Long shelf life when stored at room temperature; check the date code before use.

Safety and disposal

• Keep coin cells away from children and pets; ingestion is dangerous. If swallowed, seek immediate medical attention.
• Do not recharge, short‑circuit, crush, or incinerate.
• Tape the terminals of spent cells and recycle at an approved battery collection point. Do not dispose in household trash where prohibited.

FAQ

Is CR1632 the same as ECR1632, DL1632, or KCR1632?

Yes. These prefixes are brand designations for the same size and chemistry. Match the core code CR1632.

Can I replace a CR1620 or CR2032 with a CR1632?

Generally no. Even small differences in diameter or thickness prevent proper fit and can cause poor contact or damage. Use the size specified by the device.

Why does my key fob still not work after installing a new battery?

Common issues include reversed polarity, bent or dirty contacts, an incorrect battery size, or the need to re‑pair the fob with the vehicle. Check each before assuming the new cell is faulty.

Are CR1632 batteries rechargeable?

No. CR‑series cells are primary (single‑use). Rechargeable coin cells use different labels (such as LIR or ML) and voltages.

Will cold weather affect performance?

Yes. Capacity and voltage drop faster in low temperatures. Keep a spare on hand if your device is used outdoors in winter.