Renata CR1620 (Lithium Coin)

Renata CR1620 Lithium Coin Battery (3V)

The Renata CR1620 is a primary (non-rechargeable) 3V lithium manganese dioxide coin cell sized 16 mm × 2.0 mm. It fits many car key fobs, watches, calculators, and compact sensors that require steady voltage in a small footprint.

Quick specs

Chemistry	Lithium manganese dioxide (Li‑MnO₂)
Nominal voltage	3.0 V
Size	16 mm diameter × 2.0 mm height
Typical capacity	60–75 mAh (device/load dependent)
Typical loads	Continuous ≤0.2 mA; short pulses up to ~10–15 mA (low duty cycle; device dependent)
Operating temperature	−20 °C to +60 °C (device dependent)
Shelf life	Up to ~8–10 years when stored at room temperature
Compliance	Mercury‑free; RoHS compliant

When to choose CR1620

• Use if your device or manual specifies CR1620, DL1620, or ECR1620.
• Avoid if your device calls for a different thickness (e.g., CR1616 at 1.6 mm or CR1632 at 3.2 mm). The wrong size can cause poor contact, short runtime, or damage.
• Not rechargeable: Do not attempt to recharge. Rechargeable equivalents (e.g., LIR1620) are uncommon and require devices designed for them.
• Best for low-to-moderate drain devices that need long standby life and occasional pulses (e.g., RF transmissions).

Compatibility and cross‑references

Equivalent codes: CR1620, DL1620 (Duracell), ECR1620 (Energizer), 5009LC (industry cross‑ref).

• Similar but not interchangeable: CR1616 (thinner), CR1632 (thicker). Match both diameter and height.
• Different chemistry: BR1620 (poly‑carbon monofluoride) shares size but has lower capacity and different voltage behavior. Only use if specifically allowed by the device manufacturer.

Expected runtime (typical)

• Car key fob: ~1–3 years, shorter with proximity/unlock features or frequent use.
• Quartz watch: ~2–4 years for simple timekeeping; less with alarms or lighting.
• Small sensor/remote: months to a few years, depending on transmission interval and temperature.

Actual life varies by load, duty cycle, contact quality, and ambient temperature. Cold weather reduces available capacity; frequent high-current pulses shorten life.

Installation checklist

1. Confirm the exact code: CR1620 (16 × 2.0 mm).
2. Power off the device if possible and open the battery compartment carefully.
3. Note polarity before removal; the flat side is usually +. Insert the new cell matching the markings.
4. Handle by the edges; avoid shorting the cell. Use non‑metallic tools when possible.
5. Lightly wipe contacts and the new cell with a dry, lint‑free cloth to remove oils.
6. If your device uses multiple coin cells, replace all at the same time. Do not mix old and new.

Troubleshooting tips

• Device still dead: Check spring contacts for bending/corrosion and ensure proper polarity. Verify you installed CR1620 (not CR1616/CR1632).
• Key fob issues: Some vehicles require a re‑sync after battery change; consult the owner’s manual.
• Rapid drain: Disable proximity/unlock features for a week to compare drain. Inspect for stuck buttons or moisture in the device.

Pros and cons

• Pros: Compact size; low self‑discharge; long shelf life; stable 3V output for low‑drain electronics.
• Cons: Limited high‑current capability; not rechargeable; sensitive to cold temperatures.

Safety and disposal

• Ingestion hazard: Keep away from children and pets; use child‑resistant packaging. If swallowed, seek immediate medical attention.
• Do not recharge, short, crush, or incinerate. Avoid loose storage with metal objects.
• Store in a cool, dry place in original packaging. Recycle or dispose per local battery guidelines.

FAQ

Is CR1620 the same as DL1620 or ECR1620?

Yes. These are brand codes for the same size and chemistry. Confirm 3V and 16 × 2.0 mm dimensions.

Can I substitute CR1616 or CR1632?

No. Thickness differences prevent proper contact and can damage the device. Use exactly CR1620 when specified.

What’s the shelf life of a CR1620?

About 8–10 years when stored at room temperature in unopened packaging. Check the package expiration date.

How can I tell if my old CR1620 is weak?

Open‑circuit voltage below ~2.9 V suggests depletion. Even at ~3.0 V, a cell may fail under load; device resets, dim displays, or shorter range indicate replacement is needed.

Is BR1620 an acceptable alternative?

Only if your device allows it. BR cells have lower capacity but better high‑temperature stability. For most consumer electronics, use CR1620.