Renata CR2430 (Lithium Coin)

Renata CR2430 Lithium Coin Cell (3V)

The Renata CR2430 is a primary (non‑rechargeable) lithium manganese dioxide coin cell sized 24 mm × 3.0 mm. It provides steady 3V output, low self‑discharge, and reliable performance for compact electronics that run for months or years on a single cell.

Key Specs

When to Choose

• Your device specifically lists CR2430 (also written as DL2430 or ECR2430).
• Use in low‑to‑moderate drain electronics: security/contact sensors, key fobs, bike computers, glucose meters and other non‑implant medical monitors, memory/RTC backup, small IoT sensors.
• When you want long shelf life and infrequent replacements.

Avoid If

• You need a different size (e.g., CR2032 or CR2450). These are not interchangeable due to diameter/thickness differences.
• You require rechargeability. CR2430 is not rechargeable; LIR2430 is a different chemistry/voltage and typically not compatible.
• Your application demands sustained high current or frequent heavy pulses beyond typical coin‑cell capability (consider larger primary lithium cells instead).

Compatibility Notes

• Equivalent designations: CR2430 (IEC), DL2430 (Duracell), ECR2430 (Energizer).
• Fits holders made for 24 mm × 3.0 mm cells only. CR2450 (5.0 mm thick) will not fit; CR2032 has a smaller diameter and may lose contact.
• Do not stack smaller cells as a substitute—this can damage the device and create safety risks.
• Some devices may mention BR2430 (poly‑carbon monofluoride). While similar in size, BR and CR cells have different discharge characteristics; use the type specified by the device.

Performance and Runtime

Actual runtime depends on average current, pulse profile, cutoff voltage, and temperature. Assuming ~280 mAh usable capacity:

• 20 µA average draw: ~14,000 hours (~1.6 years)
• 100 µA average draw: ~2,800 hours (~3.8 months)
• 1 mA average draw: ~280 hours (~11–12 days)

Notes: Cold temperatures reduce capacity and peak current. Brief RF pulses are common in key fobs/sensors; ensure the device’s pulse load is within typical coin‑cell limits.

Installation Tips

• Confirm the exact type: CR2430 (not CR2032/CR2450).
• Observe polarity: the flat top is usually positive (+).
• Handle by the edges; keep contacts clean and dry. If needed, wipe with isopropyl alcohol and let dry.
• Use non‑metal tweezers or gloves to avoid short circuits; do not force the holder.
• After replacement, some devices may require re‑pairing or a time/date reset.

Storage and Shelf Life

• Store in original packaging at room temperature (10–25°C / 50–77°F), dry, away from heat and sunlight.
• Low self‑discharge (~1–2%/year at room temp) helps preserve capacity for years when stored properly.
• Do not store loose or with metal objects; avoid freezing or high humidity.

Safety and Disposal

• Keep out of reach of children. Coin cells are a choking and ingestion hazard—seek immediate medical attention if swallowed.
• Do not recharge, short, crush, puncture, or incinerate.
• Tape the terminals before disposal and recycle per local regulations where available.

Pros and Cons

• Pros: High capacity for its size, stable 3V output, very low self‑discharge, long storage life, mercury‑free.
• Cons: Not rechargeable; limited high‑drain capability compared with larger cells.

FAQ