Duracell CR1616 Lithium Coin Battery (3V) — Slim Power for Key Fobs and Wearables

The Duracell CR1616 is a 3-volt lithium coin cell designed for compact devices that require a thin profile and reliable, steady output. Use CR1616 only if your device or the original cell explicitly specifies “CR1616.”

At a Glance

• Size: 16 mm diameter × 1.6 mm thickness (coin-cell, non-rechargeable)
• Chemistry: Lithium manganese dioxide (Li‑MnO₂)
• Nominal voltage: 3 V
• Typical capacity: about 45–55 mAh (varies by brand and load)
• Operating range (typical for lithium coin cells): −20°C to +60°C

Best For

• Automotive key fobs and small RF remotes
• Wearables and fitness accessories
• Medical sensors and instruments when specified by the manufacturer
• Bike computers, digital thermometers, calculators
• Backup memory/RTC retention in compact electronics

When to Choose CR1616 (and When to Avoid)

• Choose if your device lists CR1616 or DL1616 on the old cell or in the manual.
• Choose if the battery door won’t close with thicker cells; CR1616 is thinner than CR1620/CR1632.
• Avoid if your device calls for CR1620, CR2016, CR2032, or another code—diameter/thickness and capacity differ.
• Do not stack cells to “make it fit” unless the device manual explicitly instructs it.

Installation Steps (2–5 minutes)

1. Confirm the code: Check the device manual or the printing on the old battery for “CR1616.”
2. Open the compartment: Use the notch or a small screwdriver per the manual.
3. Observe polarity: The “+” side (marked) typically faces up; follow the diagram inside the device.
4. Clean contacts: Wipe with a dry, lint-free cloth to remove oils and dust.
5. Seat the cell flat: Close the door without force and test the device at close range.

Runtime Expectations

• Key fobs: often 1–3 years with intermittent use
• Wearables/sensors: roughly 6–12 months depending on sampling rate and alerts
• Backup memory: potentially multi-year standby at very low current draw
• Cold weather, frequent transmissions, and constant backlighting reduce life.

Compatibility Notes

• Equivalent naming: CR1616, DL1616, ECR1616 (same size/chemistry; verify specs)
• Not interchangeable: CR1620 (thicker), CR2016 (larger diameter), CR1632/CR2032 (thicker and/or larger)

CR1616 vs. Similar Sizes

Troubleshooting

• No power after replacement: Re-check polarity and verify the device calls for CR1616. Ensure the door latches fully.
• Intermittent operation: Clean contacts, reseat the cell, and remove any debris from the holder.
• Short lifespan: High transmit frequency, cold temperatures, or always-on features can accelerate drain.

Safety and Storage

• Button battery hazard: Keep away from children and pets. If swallowed, seek immediate medical attention.
• Do not charge: CR1616 is a primary (non-rechargeable) cell—never attempt to recharge.
• Prevent shorts: Do not store loose with metal objects; keep in original packaging. Tape terminals on used cells before disposal.
• Store cool and dry: Room temperature, low humidity. Many lithium coin cells maintain readiness for years when stored properly.
• Recycle or dispose according to local regulations.

FAQs

Is CR1616 the same as DL1616?

DL1616 is a Duracell designation for the same size and chemistry as CR1616. Check your device manual for acceptance of equivalents.

Can I use a CR1620 instead?

No, unless your device explicitly allows it. CR1620 is thicker and can stress the holder, prevent the door from closing, or create poor contact.

What do the numbers mean on CR1616?

“16” is the diameter in millimeters (16 mm) and “16” indicates 1.6 mm thickness. “CR” denotes lithium-manganese dioxide chemistry.

How long will a CR1616 last in a key fob?

Often 1–3 years with normal use, but range depends on usage patterns, signal strength, and climate.

Is it safe for medical devices?

Use only if the device manufacturer specifies CR1616. Follow any specific brand or chemistry requirements in the device documentation.