Your CR1620 battery just died, and you can't find a replacement at the nearest store. You're staring at a drawer full of tiny silver batteries that all look the same — but are they actually interchangeable? The short answer is: some yes, some no, and one could be genuinely dangerous if you get it wrong. This guide cuts through the confusion and tells you exactly which batteries can safely replace a CR1620 and which ones to avoid.

The CR1620 is a small, round lithium-manganese dioxide coin cell battery that produces 3 volts. If you've ever changed the battery in a car key fob, a calculator, or a thin digital watch, there's a good chance you've handled one.

The name follows a standard IEC coding system: "C" indicates the lithium/MnO₂ chemistry, "R" means round, and "1620" describes the physical dimensions — 16mm in diameter and 2.0mm in height. Once you understand that, decoding other coin cell names becomes straightforward.

Common brand equivalents for the exact same battery include Panasonic CR1620, Maxell CR1620, Sony CR1620, Energizer ECR1620, and Duracell DL1620. These are all the same battery with different labels on the packaging.

Before looking at replacements, it helps to know what you're replacing. The CR1620 operates at a nominal voltage of 3V, holds a typical capacity of around 70mAh, and measures 16mm wide and 2.0mm thick. It handles temperatures from -30°C to +85°C — well suited for most everyday environments.

One important note: the CR1620 is a non-rechargeable battery. Trying to recharge it is not just ineffective — it's a safety risk. We'll come back to this when discussing LiR1620.

A battery can safely replace the CR1620 only if three conditions are met: same physical size (16mm × 2.0mm), same nominal voltage (3V), and compatible chemistry. When all three match, the device works as intended.

Here are all the direct equivalents:

The first six are straightforward — pick whichever is available. They're electrically and physically identical.

About LiR1620: This is a rechargeable lithium-ion variant that shares the same physical dimensions but delivers a slightly higher voltage (3.6–3.7V instead of 3V). Using it in a device designed for 3V can stress or damage the circuitry over time. Unless your device's manual explicitly states it accepts rechargeable coin cells, stick with the standard non-rechargeable options.

About BR1620: Technically compatible, but better suited for devices with very low power draw over long periods (like memory backup in industrial equipment). For everyday use — car remotes, calculators, toys — any CR1620 equivalent works just as well.

For CR1620 batteries, Panasonic, Maxell, Sony, Energizer, Duracell, Renata, and Varta are all well-established manufacturers with consistent quality control. Any of these is a safe choice.

Generic or no-brand alternatives sold online can work fine, but capacity and shelf life vary more widely. If your device is something you rely on — like a car key remote or a medical device — it's worth paying a little more for a name-brand cell. For a TV remote or a toy, the budget option is usually fine.

These three batteries look nearly identical and share the same 16mm diameter, but they have different heights:

· CR1616 — 16mm × 1.6mm (thinnest)

· CR1620 — 16mm × 2.0mm (standard)

· CR1632 — 16mm × 3.2mm (thickest)

If your device takes a CR1620, fitting in a CR1616 might seem to work initially, but the thinner cell won't make proper contact with the terminals and will likely give unreliable performance. A CR1632 is too thick to fit in most cases and could physically damage the battery compartment.

The rule is simple: only replace with the exact height. When in doubt, check the number embossed inside the battery compartment lid.

The CR1620 appears in more devices than most people realize:

Car key fobs and remotes are the most common application. Most thin key fob designs use CR1620 because it offers the right balance of capacity and compact size.

Calculators and digital watches have relied on this form factor for decades. The flat profile fits neatly into slim device designs where a larger battery would add too much bulk.

Medical devices such as personal blood glucose monitors and small health trackers often use CR1620. In these cases, sourcing a reliable brand matters more than saving a dollar on a generic pack.

Nintendo Switch game card readers and some handheld gaming accessories also use this battery type, though always double-check — different versions of the same device can use different cells.

Most people only realize their battery is dead when something stops working. Here's how to check before that happens:

With a multimeter: Set it to DC voltage and touch the probes to both flat faces of the coin cell. A healthy CR1620 reads 3.0–3.1V under no load. Anything below 2.8V and it's time to replace. Below 2.5V and it's essentially dead.

Without tools: Watch for behavioral clues. A car remote that used to work from 10 meters away now only responds within arm's reach. A calculator display becomes faint or shows erratic characters. These are signs the voltage is dropping.

Check the date: CR1620 batteries have a shelf life of 5–10 years in the original packaging. If you're pulling one from an old drawer, check the expiry date printed on the wrapper before trusting it.

Is ECR1620 the same as CR1620?

Yes, completely. ECR1620 is Energizer's naming convention for the same CR1620 chemistry and dimensions. They're interchangeable in any device.

Can I use a CR1632 instead of a CR1620?

No. A CR1632 is 3.2mm tall vs the CR1620's 2.0mm. It's too thick to fit in most CR1620 battery compartments, and forcing it in can damage the contacts.

Is LiR1620 a safe replacement for CR1620?

Not recommended. LiR1620 is a rechargeable lithium-ion cell with a higher nominal voltage (3.6V vs 3.0V). Using it in a device rated for 3V could overstress the circuitry. Use it only if your device manual explicitly approves rechargeable coin cells.

How long does a CR1620 battery last in regular use?

It depends heavily on the device. In a car key fob used several times a day, expect 1–3 years. In a calculator or low-drain device, a single CR1620 can last 3–5 years or longer.

Where can I buy CR1620 batteries?

They're widely available at hardware stores, pharmacies, electronics retailers, and online. Most automotive parts stores stock them since they're popular for key fobs. If you need bulk quantities or hard-to-find branded variants, electronic component distributors like Welllinkchips.com carry them in quantity.

Can you recharge a standard CR1620?

No. The CR1620 (and all CR-series batteries) is a primary (non-rechargeable) lithium cell. Attempting to charge it with standard chargers creates heat and pressure buildup inside the sealed case — a genuine safety hazard. If you want a rechargeable option, that's the LiR1620, but use it only in devices designed for it.

Replacing a CR1620 is straightforward once you know the rules. Any battery in the ECR1620, DL1620, BR1620, or Varta 5009LC family will work as a direct drop-in replacement. Stick to reputable brands for anything mission-critical, double-check the height if you're tempted to use a CR1616 or CR1632, and keep the LiR1620 away from devices that weren't designed for rechargeable cells.

If you're sourcing CR1620 batteries in volume for electronics assembly or product manufacturing, Welllinkchips.com carries Panasonic, Maxell, and other major-brand variants with fast lead times.