Energizer CR1620 Batteries

Energizer CR1620 Batteries

Energizer CR1620 is a slim, 3-volt lithium coin cell designed for devices that explicitly call for “CR1620.” It balances small size with solid capacity, making it a reliable choice for key fobs, watches, heart-rate straps, bike sensors, thermometers, calculators, and compact wearables.

Quick Specs

Model	CR1620
Chemistry	Lithium manganese dioxide (Li/MnO2)
Nominal voltage	3 V
Size	16 mm diameter × 2.0 mm thick
Typical capacity	About 65–80 mAh (device and brand dependent)
Operating temperature	Approximately -22°F to 140°F (-30°C to 60°C)
Shelf characteristics	Low self-discharge for multi-year storage when sealed; check date code on the package

Capacities and run time vary by device load, temperature, and duty cycle.

When to Choose CR1620

• Your device, manual, battery door, or old cell says “CR1620.”
• You need more capacity than a CR1616 without increasing diameter.
• The battery compartment is thin and cannot accept a taller CR1632.

Common Use Cases

• Automotive key fobs and remotes with slim battery doors
• Quartz watches and compact wearables
• Heart-rate straps, bike speed/cadence sensors
• Digital thermometers and small medical devices (check device manual)
• Calculators, small remotes, and memory backup functions

CR1620 vs. CR1616 vs. CR1632 (Same Diameter Family)

Model	Thickness	Relative capacity	Use when
CR1616	1.6 mm	Lower	Ultra-thin compartments
CR1620	2.0 mm	Medium	Device specifies CR1620
CR1632	3.2 mm	Higher	Compartment supports extra height

Important: Match the exact code. Thicker cells can stress doors or contacts; thinner cells can lose contact and cause resets.

Installation (2–5 minutes)

1. Confirm the code on the device, manual, or old battery.
2. Open the compartment carefully; note polarity.
3. Wipe contacts with a dry, lint‑free cloth.
4. Insert the cell with the large flat face as positive (+) unless marked otherwise.
5. Close the door evenly; test functions (range on fobs, time/backlight on watches, pairing on sensors).

Expected Run Time (Typical Ranges)

• Key fobs: about 3–18 months, depending on use and temperature.
• Quartz watches: roughly 6–24 months, shorter with alarms/backlights.
• Chest-strap HR sensors: about 1–6 months based on weekly hours.
• Bike sensors/thermometers: about 3–12 months depending on duty cycle.

Your results depend on transmit power, feature use, and environment. Dating the install helps you set a realistic replacement interval.

Safety and Handling

• Keep coin cells away from children and pets. If swallowed, seek immediate medical care or contact poison control.
• Do not recharge, puncture, or expose to heat.
• Avoid short circuits; do not store loose with keys or coins.
• Store sealed at room temperature in a dry, dark place.
• Tape used cells or return them to packaging before disposal; follow local recycling guidance.

Troubleshooting

• No power after replacement: verify polarity, reseat the cell, clean contacts, and try a second battery.
• Short range on a fob: confirm the case fully snaps closed and test away from potential interference; inspect for worn buttons.
• Intermittent resets: ensure CR1620 (2.0 mm) is correct; too thin or thick can cause poor contact.
• Warm battery or corrosion: remove immediately; check for a short or liquid ingress before reinstalling.

Compatibility Notes

• Also seen as ECR1620 (Energizer legacy code) or DL1620 (cross-brand equivalent).
• Only substitute if the device manual explicitly allows it.
• For devices that specify CR1620, use CR1620—do not force CR1616 or CR1632.

Buying Tips

• Single or 2–4 packs work well for occasional replacements; keep one sealed spare.
• Check fresh date codes and intact packaging to ensure authenticity.
• Label your install date to optimize your replacement interval.

FAQ

Is CR1620 rechargeable?

No. CR1620 is a primary (single‑use) lithium cell and must not be recharged.

Can I use CR1616 or CR1632 instead?

Not unless your manual says it’s acceptable. Same diameter, different thickness—fit and contact pressure will change.

Which side is positive?

The large, flat face is positive (+). Match the marking inside the battery door.

How long do spares last in storage?

Sealed coin cells have low self‑discharge and can be stored for years at room temperature. Use packages with clear date codes and keep them dry and out of reach of children.

What if my device still misbehaves after a fresh CR1620?

Reseat the battery, clean contacts, confirm the compartment closes fully, and try another new cell. If issues persist, the device may need service.