Duracell CR1620 Lithium Coin Battery (3V) — Reliable Power for Slim Devices

The Duracell CR1620 is a compact 3-volt lithium coin cell designed for devices where space is tight but dependable power matters. It is commonly used in car key fobs, glucose meters, heart-rate straps, bike computers, small trackers, digital thermometers, and memory backup functions. If your device or the original cell specifies “CR1620” (also seen as DL1620 or ECR1620), this is the correct size.

When to Choose or Avoid

• Choose CR1620 if: Your device explicitly calls for CR1620/DL1620/ECR1620; you need a 16 mm diameter coin cell with 2.0 mm thickness; the device has brief, moderate current pulses (e.g., key fob transmissions).
• Avoid CR1620 if: Your device specifies a different size (e.g., CR1616, CR2016, CR2032) or a different chemistry (e.g., BR1620); the device requires a rechargeable coin cell (e.g., LIR series).

Technical Snapshot

• Chemistry: Lithium manganese dioxide (Li‑MnO₂), primary (non‑rechargeable)
• Nominal voltage: 3 V
• Dimensions: 16 mm diameter × 2.0 mm height
• Typical capacity: ~60–80 mAh (varies by load and cutoff)
• Common cross‑references: CR1620, DL1620 (Duracell), ECR1620 (Energizer)

Runtime Expectations (Typical)

• Car key fobs: About 1–3 years with light use; 6–18 months with heavy use.
• Glucose meters/compact medical devices: Roughly 6–24 months depending on test frequency and backlight use (follow device guidance).
• Heart‑rate straps and fitness sensors: About 3–12 months, depending on weekly training hours and temperature.
• Bike computers/small trackers: Around 6–12 months based on screen updates and sensor polling.

Actual life depends on transmission frequency, temperature swings, storage time, and device power design.

CR1620 vs. Similar Sizes

These cells differ by diameter and thickness. CR1620 (16 × 2.0 mm) is thicker than CR1616 (16 × 1.6 mm) and smaller in diameter than 20 mm cells (CR2016/CR2032). Using the wrong size can cause poor contact, doors that won’t close, or short runtime. Always match the exact code on the old battery or in the device manual.

Installation Guide

1. Verify the code: Confirm “CR1620” on your old battery or device documentation.
2. Observe polarity: The “+” side usually faces up—follow the device diagram.
3. Clean contacts: Wipe contacts with a dry, lint‑free cloth to remove oils and dust.
4. Seat the cell flat: Ensure it sits level; close the door without force.
5. Test function: For remotes, test at close range to confirm solid contact.

Storage, Handling, and Safety

• Store spares in original packaging in a cool, dry place; avoid heat and humidity.
• Do not carry loose cells with keys or coins (short‑circuit risk).
• Keep out of reach of children and pets; coin cells can be hazardous if swallowed.
• If ingestion is suspected, seek immediate medical attention—do not induce vomiting.
• Recycle or dispose of used cells according to local regulations; tape terminals before disposal to prevent shorting.

Tips to Maximize Life

• Use the exact size and chemistry your device specifies.
• Disable beeps, LEDs, or background scanning when possible.
• Turn devices off when not in use (if supported).
• Keep contacts clean to reduce resistance and voltage drop.

Troubleshooting

• No power after replacement: Recheck polarity, confirm the device requires CR1620, and ensure the battery door fully latches.
• Intermittent operation or short range: Reseat the cell; gently adjust the contact spring only if your manual permits.
• Short life: Frequent transmissions, continuous sensor polling, or temperature extremes accelerate consumption.

FAQs

Is CR1620 rechargeable?

No. CR1620 is a primary lithium coin cell. Use only rechargeable coin cells if your device explicitly requires them.

Is DL1620 the same as CR1620?

Yes. DL1620 is Duracell’s designation for the CR1620 size and chemistry.

Can I substitute CR1616 or CR2016?

No. CR1616 is thinner and may lose contact; CR2016/CR2032 are wider and will not fit. Match the exact code.

How long will a CR1620 last in a key fob?

Typically 1–3 years with light use. Frequent button presses, weak signal areas, or cold weather can shorten life.

What about BR1620?

BR1620 (carbon monofluoride chemistry) favors very low‑drain, high‑temperature stability but lower pulse capability. Use the chemistry your device specifies.

Summary

Duracell’s CR1620 delivers compact, steady 3V power for key fobs, meters, and wearables. Match the exact size, install with correct polarity, and store spares properly to keep essential electronics ready.