CR123 vs. CR123A Batteries: What’s the Difference, Are They Interchangeable, and Which Should You Buy?

CR123 vs. CR123A Batteries: The Real Difference (and the Buying Mistakes to Avoid)

You’re here for one reason: you don’t want to buy the wrong battery—especially when it powers something you actually rely on (a torch, camera, security sensor, or specialised gear). The good news is that most confusion around CR123 vs CR123A batteries comes down to naming, not performance.

But there is one common trap: rechargeable “lookalike” batteries that can fit physically, yet run at a different voltage. This guide will make sure you buy the right thing the first time—and if you’re ready to purchase, you’ll also know exactly where to go on the site.

CR123 vs. CR123A Batteries — Are They the Same?

In most cases, CR123 and CR123A refer to the same size and type of battery, just labeled differently.

“CR123A” is a very common retail/packaging label.
“CR123” is often used as shorthand.
You may also see “123,” “DL123A,” “EL123A,” or similar equivalents, depending on brand conventions.

Practical takeaway: If your device says CR123 and you find CR123A batteries, you’re typically buying the correct battery type.

Quick Specs Comparison (CR123 vs CR123A)

Here’s what matters most when you’re checking compatibility:

Chemistry: usually lithium primary (non-rechargeable)
Nominal voltage: typically 3V
Use case: excellent for compact, high-drain devices

If you want to shop by the exact size label instead of guessing, use Shop batteries by size.

Are CR123 and CR123A Batteries Interchangeable?

In typical consumer use, yes—as long as you’re comparing the same type: 3V lithium primary (non-rechargeable).

When interchangeability is usually safe

Your device manual lists CR123A and you bought CR123 (or vice versa)
You’re using standard 3V lithium primary cells
The device isn’t explicitly calling for a rechargeable alternative

When to be cautious

Be careful when:

You’re considering rechargeables (more on this below)
Your device uses multiple cells together
The device is sensitive or mission-critical (certain camera flashes, optics, tactical equipment)

Rule of thumb: match voltage + chemistry + size, not just the label.

The Lookalike Battery That Causes Problems: RCR123A (Rechargeable)

This is where people get into trouble.

CR123A vs RCR123A (rechargeable) — what’s different?

Rechargeable alternatives (often labeled RCR123A or 16340) may be similar in size, but they often run at higher voltage than a standard 3V primary CR123A. Some devices can handle that. Many cannot.

If you want a deeper (and safer) walkthrough of rechargeable replacements, read 4 best rechargeable equivalents for the Duracell CR123A battery.

How to tell if your device supports rechargeable equivalents

Look for wording like:

“Supports 16340”
“Supports RCR123A”
“Rechargeable compatible”
A stated input range that clearly supports higher voltage

If you don’t see this in the manual, stick with standard CR123A batteries.

Which One Lasts Longer?

If you’re comparing true equivalents (CR123 vs CR123A as 3V lithium primary cells), performance is usually very similar. Real-world runtime depends more on:

Your device’s power draw (high-output lights drain faster)
Battery quality and freshness
Storage conditions and age
Temperature (cold weather can change performance)

If you’re buying for frequent use or a workplace, it’s often smarter to buy batteries in bulk to keep spares consistent and ready.

Best Use Cases for CR123/CR123A Batteries

High-performance torches and tactical lights

CR123/CR123A is popular in compact high-output lights. If you’re shopping specifically for torch power options, browse torch batteries.

Cameras and photography gear

Many cameras and accessories benefit from the stable output and shelf-life advantages of lithium primary cells.

Security devices and sensors

CR123A is common in sensors and alarms, where reliability and long shelf life matter more than rechargeability.

Buying Guide — How to Choose the Right CR123A Battery

If you want a no-stress purchase decision, follow this:

Step 1 — Confirm what your device actually requires

Check the device label or manual for: CR123, CR123A, DL123A, EL123A, or “123”.

If you want the fastest path to the right match, go directly to CR123A batteries.

Step 2 — Decide: primary (non-rechargeable) vs rechargeable

Choose primary CR123A if:

You want maximum reliability and shelf life
It’s for emergency, security, or “must work” gear
Your device does not explicitly support rechargeables

Choose rechargeable options only if your device explicitly supports them (and use the guidance in 4 best rechargeable equivalents…).

Step 3 — If you use them often, buy the format that matches your usage

For frequent replacement and better value, consider bulk options like Duracell Procell Intense CR123A bulk box of 12.
For occasional use, smaller packs may be more practical.

Step 4 — Avoid mixing old and new cells in multi-battery devices

If your device uses two cells, replace them together. Mixed ages and charge states can cause uneven performance.

Conclusion — What You Should Buy (Based on Real-Life Use)

If your device calls for CR123 or CR123A, you can usually treat them as interchangeable—just make sure you’re buying the standard 3V lithium primary version unless your device explicitly supports rechargeables.

If you want a straightforward place to buy, start with CR123A batteries. If you’re replacing them regularly for business or gear kits, you’ll likely save time and money when you buy batteries in bulk.

See related: AA Batteries: The 2025 Complete Guide

Safety Tips (Especially for High-Drain Devices)

Don’t recharge non-rechargeable CR123/CR123A batteries
Don’t use damaged or dented cells
Don’t mix battery types (primary + rechargeable) in the same device
Store spares in a case to avoid shorting (keys/coins are the classic problem)

Featured Snippet: CR123 vs CR123A — The 20-Second Answer

Are CR123 and CR123A the same?

Usually yes. CR123A is commonly the full retail label, while CR123 is often shorthand.

Can I replace CR123 with CR123A?

In most cases, yes, if both are standard 3V lithium primary cells.

What should I not swap in without checking?

Rechargeable lookalikes like RCR123A/16340, unless your device manual explicitly supports them.

FAQ — CR123A Battery Equivalent and Common Questions

What is a CR123A battery equivalent?

Common equivalents include DL123A, EL123A, and “123” labels—provided they match the same size and chemistry.

Is CR123A better than CR123?

Not inherently—most of the time it’s simply a different naming convention.

What does the “A” mean in CR123A?

For consumers, the “A” usually doesn’t indicate a different battery type—it’s more of a naming/label convention used by brands and retailers for the same standard-size 3V lithium primary cell.

Can I replace a CR123 battery with a CR123A?

Yes, typically you can. If your device calls for CR123 or CR123A, a standard 3V lithium primary version of either label is usually compatible.

Are CR123A batteries interchangeable across brands?

Usually yes—if they’re the same chemistry (lithium primary) and voltage (3V). However, real-world runtime can vary by brand, age, and storage conditions.

Is a CR123A battery 3V or 3.7V?

A standard CR123A lithium primary battery is 3.0V. Confusion happens because rechargeable lookalikes (often 16340/RCR123A) are typically around 3.6–3.7V nominal and can be 4.2V when fully charged.

What’s the difference between CR123A and RCR123A (16340)?

Voltage and chemistry. CR123A is usually non-rechargeable lithium (Li/MnO₂) at 3V, while RCR123A/16340 is typically rechargeable lithium-ion with higher voltage.

Can I use a 16340 (RCR123A) instead of CR123A in my flashlight or camera?

Only if your device explicitly supports 16340/RCR123A. A 16340 can reach 4.2V fully charged, and using it in 3V-only devices can cause malfunctions or damage.

What are common CR123A equivalents?

Common equivalents include DL123A (Duracell), EL123A (Energizer), and sometimes CR17345/CR17335 naming depending on supplier listings—always verify it’s the same 3V lithium primary format.

What are the dimensions of a CR123A battery?

CR123A cells are typically about 17 mm diameter and 34.5 mm height (often shown in manufacturer datasheets).

What devices commonly use CR123A batteries?

They’re commonly used in high-output flashlights/torches, cameras/photography gear, and security devices/sensors, where stable voltage and strong performance matter.

Are CR123A batteries rechargeable?

Standard CR123A lithium primary batteries are not rechargeable. Manufacturer datasheets typically warn not to recharge and to avoid short-circuiting/overheating.

Are CR123A batteries lithium-ion?

Most CR123A you see for cameras/flashlights are lithium primary (Li/MnO₂)—not lithium-ion. Lithium-ion versions are usually labeled RCR123A/16340.

How long do CR123A batteries last in storage (shelf life)?

They’re known for low self-discharge and long storage life when kept cool and dry; some datasheets highlight very low loss after a year of storage at room temperature. Always check the pack’s expiry date.

Do CR123A batteries work well in cold weather?

They’re often chosen for reliable performance across a wide temperature range, which is why they’re popular in outdoor gear and high-drain devices.

Can I mix old and new CR123A batteries (or mix brands)?

It’s best not to. Mixing old/new or different brands in the same device (especially if it uses two cells) can cause uneven discharge and inconsistent performance.

Can CR123A batteries leak or become dangerous?

Any battery can become hazardous if short-circuited, overheated, damaged, or improperly stored. Datasheets commonly warn against crushing, heating, or shorting the terminals.

How should I store CR123A batteries safely?

Store them in original packaging or a battery case, away from metal objects (keys/coins), heat, and moisture to reduce short-circuit risk.

Can I take CR123A batteries on an airplane?

In general, spare (uninstalled) lithium batteries should be in carry-on baggage, with terminals protected from short circuits. Rules vary by airline and country, so check your carrier before flying.

Is CR123A the same as CR2 or CR2032?

No—CR2 and CR2032 are different sizes and use cases. Even if the chemistry is “lithium,” the physical dimensions and intended devices differ, so don’t substitute by name alone.

Where can I double-check battery sizes if I’m unsure?

Use the Battery Sizes Australia buyer’s guide or go straight to Shop batteries by size.

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