Duracell CR1620 Lithium Coin Battery — Compact 3V Power for Key Fobs, Meters, and Trackers

The Duracell CR1620 is a slim 3-volt lithium coin cell built for compact electronics that need dependable starts and steady voltage. Common in automotive key fobs, glucose meters, fitness sensors, compact wearables, and small IoT devices, the CR1620 combines a miniature footprint with reliable shelf life and temperature resilience. If your manual or original cell specifies “CR1620,” this is the correct size—ensuring proper fit, contact pressure, and predictable runtime.

Why Choose CR1620?

• Stable 3V output: Supports RF transmitters, meters, and memory backup functions.
• Compact size: Ideal for tight housings where larger 20 mm cells won’t fit.
• Strong shelf life: Keep spares on hand so critical devices are ready when needed.
• Temperature tolerance: Designed to perform across everyday hot/cold swings.
• Leak-resistant construction: Added protection for sensitive electronics.

Typical Applications

• Automotive keyless entry remotes and access fobs
• Glucose meters and compact medical sensors (as specified)
• Fitness trackers, HR straps, and wearables
• Small trackers, bike computers, and digital thermometers
• Memory backup for compact electronics

Technical Snapshot

• Chemistry: Lithium manganese dioxide (Li-MnO₂)
• Nominal voltage: 3 V
• Dimensions: 16 mm diameter × 2.0 mm height
• Standard code: CR1620 (primary, non-rechargeable)

CR1620 vs. CR1616 vs. CR1220

These cells differ by diameter and thickness. CR1620 (16×2.0 mm) is thicker than CR1616 (16×1.6 mm) and wider than CR1220 (12×2.0 mm). Using the wrong size can cause poor contact, a door that won’t close, or shortened runtime. Always match the exact code printed on your original battery or in the device manual.

Installation Guide

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

Storage, Handling, and Safety

• Store sealed in original packaging in a cool, dry place.
• Avoid storing loose coin cells with keys or coins (short-circuit risk).
• Keep out of reach of children and pets; coin cells can be hazardous if swallowed.
• Recycle or dispose of used cells according to local rules.

Tips to Maximize Life

• Use the exact size and chemistry specified by the manufacturer.
• Power down devices when not in use, if supported.
• Minimize unnecessary beeps or lights where possible.
• Keep contact surfaces clean to reduce resistance and voltage drop.

Troubleshooting

• No power after replacement: Re-check polarity and confirm the device truly calls for CR1620.
• Intermittent range on key fob: Reseat the cell and ensure the door latches firmly.
• Short life: Frequent transmissions, temperature extremes, or constant sensor polling increase consumption.

FAQs

Is CR1620 rechargeable?

No. Use only primary CR1620 cells unless your device explicitly requires a rechargeable coin cell.

Can I use CR1616 instead?

Not recommended. It’s thinner and may cause weak contact or immediate power loss.

What do the numbers mean?

“CR” indicates lithium manganese dioxide; the first two digits are diameter (mm), and the last two indicate thickness in tenths of a millimeter (2.0 mm).

Summary

Duracell’s CR1620 provides compact, steady 3-volt power for key fobs, meters, and wearables. Match the exact size, install with correct polarity, and store spares properly to keep essential electronics ready when you need them.