Duracell CR2032 Lithium Coin Battery (3V)

A dependable 3V coin cell for small electronics that require stable voltage and long standby life. Ideal for automotive key fobs, wearables, medical sensors, and motherboard CMOS/RTC backup.

At a Glance

• Voltage: 3V
• Size: 20 mm diameter × 3.2 mm height (CR2032)
• Chemistry: Lithium manganese dioxide (Li‑MnO2)
• Typical capacity: 220–240 mAh (device- and load-dependent)
• Operating temp: ~−20 °C to 60 °C (−4 °F to 140 °F)
• Shelf life: Up to 8–10 years when stored cool and dry
• Cross-references: CR2032, DL2032, ECR2032 (match “2032” size and 3V)

When to Choose It

• Use if your device or the old cell is labeled CR2032 or DL2032.
• Best for low- to moderate-drain devices needing steady 3V output (key fobs, sensors, CMOS clocks).
• Good in mixed environments—cold garages, warm cars—within the listed temperature range.

Avoid If

• Your device specifies a rechargeable coin cell (e.g., LIR2032) or a different chemistry (e.g., BR2032 for high-temp standby).
• The battery compartment is designed for a different thickness (CR2025 or CR2016). Thinner cells may fit loosely and fail early.

Common Uses

• Car key fobs and small remotes
• Fitness trackers, heart-rate straps, bike computers
• Glucose meters and compact medical sensors
• Motherboard CMOS/RTC backup
• Smart scales, LED keychain lights, IoT sensors

Expected Runtime (Typical)

• Key fobs: about 6–18 months (depends on button use and proximity sensors)
• CMOS/RTC backup: roughly 1–5 years
• Wearable sensors/HR straps: about 6–12 months

Actual life varies with device current draw, temperature, and duty cycle.

CR2032 vs. CR2025 vs. CR2016

Always match the size your device specifies to ensure proper contact and runtime.

Installation (2–3 minutes)

1. Power down the device if possible.
2. Confirm size: look for CR2032 on the old cell or in the manual.
3. Observe polarity: the “+” side usually faces up.
4. Clean contacts gently with a dry, lint-free cloth.
5. Seat the cell without bending it; close the compartment fully.

Storage and Safety

• Store in original packaging in a cool, dry place; avoid heat and humidity.
• Keep away from metal objects; do not carry loose with keys or coins.
• Child safety: coin cells are a swallowing hazard. Keep out of reach and ensure battery doors on remotes are secure. If swallowed, seek immediate medical help.

Troubleshooting

• No power: check polarity, clean contacts, confirm the device truly requires CR2032.
• Intermittent operation: reseat the cell; ensure the door latches firmly to maintain pressure.
• Short life: verify there’s no stuck button or always-on sensor draining the battery; consider temperature effects.

Alternatives and Compatibility Notes

• LIR2032 (rechargeable): only for devices designed to charge a coin cell.
• BR2032: different lithium chemistry for high-temp, long-standby use; use only if specified.
• Larger cells (e.g., CR2450) offer more capacity but fit only if the device is designed for them.

Responsible Disposal

Do not discard in household trash. Tape terminals and bring used coin cells to a battery recycling or household hazardous waste drop-off.

FAQ

Is CR2032 the same as DL2032?

DL2032 is Duracell’s designation for the same 20 × 3.2 mm, 3V lithium coin size. If your device calls for CR2032, DL2032 is compatible.

Can I stack thinner cells (e.g., two CR2016) to replace a CR2032?

Do not stack cells. This can damage the device and create safety risks.

Is CR2032 rechargeable?

No. It is a primary (non-rechargeable) cell. Use only rechargeable types in devices that specify them.

How can I maximize battery life?

Use the specified size, keep contacts clean, avoid extreme temperatures, and turn off features like continuous backlighting when possible.