Maxell CR1620 Battery

Maxell CR1620 Lithium Coin Cell (3V)

The Maxell CR1620 is a slim 3V lithium manganese dioxide coin battery designed for compact, low‑drain or intermittent‑use electronics. Its 16 mm diameter and 2.0 mm thickness fit tight compartments while providing dependable, stable voltage for accurate operation.

Quick Specs

• Model: Maxell CR1620 (IEC: CR1620; also seen as DL1620/ECR1620 equivalents)
• Voltage: 3 V nominal
• Capacity: ~70 mAh (typical)
• Chemistry: Lithium Manganese Dioxide (Li‑MnO₂)
• Size: 16 mm (diameter) × 2.0 mm (height)
• Operating temperature: −20°C to +60°C (−4°F to +140°F)
• Shelf life: long when stored cool and dry (often up to 10 years)

Best For

• Watches and fitness sensors that need thin cells
• Keyless entry remotes and small remote controls
• Calculators, bike computers, and digital thermometers (where specified)

Use If / Avoid If

• Use if your device explicitly calls for CR1620.
• Avoid if the device specifies CR1616 (thinner) or CR1632 (thicker)—thickness must match for proper contact.
• For higher capacity in the same diameter and if space allows, devices may specify CR1632 instead; do not substitute unless the device lists it as compatible.

Typical Runtime Examples

• Quartz watch: about 2–3 years (very low continuous drain)
• Key fob: 1–2 years typical (light, intermittent use)
• Small sensor/monitor: several months to 1+ year depending on duty cycle and temperature

Actual life varies by device load, use frequency, and environment.

Compatibility and Equivalents

• Also referenced as: DL1620 (Duracell), ECR1620 (Energizer), CR1620 across most brands
• Not the same as CR1616 or CR1632—diameter is identical, thickness and capacity are not.

How It Compares (same diameter family)

Type	Diameter	Thickness	Capacity (approx.)	Common Uses
CR1616	16 mm	1.6 mm	~50 mAh	Thin watches, slim remotes
CR1620	16 mm	2.0 mm	~70 mAh	Watches, key fobs, calculators
CR1632	16 mm	3.2 mm	~120 mAh	Key fobs, trackers (if height allows)

Replacement Steps (2–5 minutes)

1. Power off the device if possible. Locate the battery cover (small screw, snap, or coin slot).
2. Open carefully and note polarity (+ side is the flat, marked face).
3. Remove the old cell without bending contacts; avoid touching surfaces with metal tools.
4. Insert the new Maxell CR1620 with correct orientation.
5. Close the compartment securely and test the device.

Storage and Handling

• Store in original packaging in a cool, dry place; avoid heat and direct sun.
• Do not mix new and used batteries or different chemistries.
• Avoid short circuits—keep loose cells away from metal objects.

Safety Notes

• Button/coin cells are a swallowing hazard. Keep away from children and pets; ensure devices have secure battery doors.
• If swallowed or inserted, seek immediate medical attention—serious injury can occur in 2 hours.
• Do not recharge, disassemble, or incinerate.
• Recycle responsibly; tape terminals before disposal to prevent shorting.

FAQ

Can I use a CR1632 instead of a CR1620?

No. While the diameter is the same, the CR1632 is thicker (3.2 mm vs 2.0 mm). Use only the size specified by your device.

How long will a CR1620 last in a watch?

Typically about 2–3 years, depending on movement type, features (e.g., alarms, lighting), and temperature.

Is the Maxell CR1620 rechargeable?

No. It is a primary (single‑use) lithium cell. Do not attempt to recharge. Rechargeable versions are labeled LIR1620 and require compatible devices.

What if my key fob still doesn’t work after replacement?

Check battery orientation, contact cleanliness, and that the compartment closes fully. Some fobs need re‑syncing after a battery change; consult your vehicle manual.

How should I dispose of used coin batteries?

Take them to an authorized battery recycler. Before transport, tape both sides of the cell to cover the terminals.