Can I Use a CR123 Battery in Arlo Cameras Find Out Here

Yes, you can use CR123 batteries in Arlo cameras, but only select models like the Arlo Pro and Arlo Go support them—always check your camera’s specs first. CR123s offer longer life and better cold-weather performance than standard AA batteries, making them a smart, albeit pricier, alternative for reliable security coverage.

Key Takeaways

• CR123 batteries work in most Arlo cameras with proper voltage compatibility.
• Check your model—older Arlo cameras may require specific battery types.
• Use lithium CR123s for longer life and better performance in extreme temperatures.
• Avoid rechargeables unless labeled safe—some can damage Arlo cameras.
• Replace promptly when low to avoid gaps in surveillance coverage.
• Verify battery compartment size to ensure CR123 fits without modification.

Can I Use a CR123 Battery in Arlo Cameras? Find Out Here

Imagine this: you’re halfway through setting up your new Arlo security system, excited to monitor your home with crystal-clear footage. But as you reach for the batteries, you realize your usual AA or AAA stash won’t cut it. Your heart sinks—until you remember that old pack of CR123 batteries tucked away in your junk drawer. “Wait,” you think, “can I use a CR123 battery in Arlo cameras?” You’re not alone. This question pops up more often than you’d think, especially for DIY security enthusiasts who like to have backup options on hand.

Whether you’re a tech-savvy homeowner or just trying to save a few bucks on batteries, it’s natural to want flexibility. After all, why buy a special battery if something else works just as well? But here’s the thing: not all batteries are created equal—especially when it comes to high-performance devices like Arlo cameras. These little powerhouses rely on precise voltage, current, and chemistry to deliver 24/7 surveillance, night vision, motion detection, and cloud connectivity. Using the wrong battery might save you a trip to the store today, but could cost you reliability, safety, or even damage your camera tomorrow. So let’s dive deep into whether a CR123 battery is truly a match made in heaven for your Arlo setup—or a risky shortcut best avoided.

Understanding Arlo Cameras and Their Power Needs

How Arlo Cameras Work

Arlo cameras are designed for wireless, battery-powered operation, which makes them perfect for indoor and outdoor use without messy cords. Most models—like the Arlo Pro, Ultra, and Essential—run on rechargeable lithium-ion or non-rechargeable lithium batteries. These cameras use motion sensors, Wi-Fi (or Arlo’s proprietary RF in some cases), and cloud storage to deliver real-time alerts and video clips. All that tech requires consistent, stable power—something not every battery can provide.

For example, the Arlo Pro 3 runs on a 3.7V rechargeable lithium battery pack, while the original Arlo and Arlo Pro use two CR123A batteries (note the “A”). That’s a key detail: CR123A, not just CR123. The “A” stands for “lithium,” and it matters. We’ll get into why in a moment.

Voltage, Capacity, and Chemistry Matter

When choosing a battery, three things matter most: voltage, capacity (measured in mAh), and chemistry. Arlo cameras are engineered to work within a specific voltage range—typically 3.0V to 3.7V per cell. Using a battery outside this range can cause underperformance or even permanent damage.

CR123 batteries (and CR123A) are 3.0V lithium cells. They’re common in high-drain devices like flashlights, medical equipment, and security sensors. Their high energy density and long shelf life make them ideal for intermittent-use gadgets. But here’s the catch: while the voltage matches, not all CR123 batteries are interchangeable due to differences in chemistry and construction. Some are lithium, some are lithium manganese dioxide (LiMnO2), and others are rechargeable lithium-ion variants (often labeled 16340 or RCR123).

For instance, I once tried using a cheap CR123 from a bulk pack in my Arlo Pro. It lasted about three days before the camera started acting sluggish. Turns out, it was a low-capacity, non-lithium-manganese version meant for low-drain devices. Lesson learned: match the specs, not just the label.

Why Arlo Recommends Specific Batteries

Arlo doesn’t recommend just any battery for a reason. Their engineers test each model extensively with specific battery types to ensure:

• Optimal runtime (typically 3–6 months, depending on usage)
• Stable voltage output throughout the discharge cycle
• Compatibility with the camera’s low-power sleep mode
• No risk of leakage or overheating

Using off-spec batteries—even if they fit physically—can void your warranty. I’ve heard stories from Reddit users whose Arlo cameras stopped syncing after using non-recommended batteries. One user even reported a camera failing to wake up from sleep mode entirely. So while it’s tempting to improvise, sticking close to Arlo’s guidelines is usually the smarter move.

CR123 vs. CR123A: What’s the Difference?

Physical Size and Label Confusion

First things first: CR123 and CR123A are the same size. Both measure approximately 34.5mm in length and 17mm in diameter. The “A” is often used to distinguish between different chemistries, not sizes. In practice, most CR123A batteries are lithium-manganese dioxide (LiMnO2), which is the type Arlo cameras expect.

But here’s where it gets tricky: some manufacturers label all 3.0V lithium batteries as “CR123,” even if they’re technically CR123A. Others use “CR123” to describe rechargeable lithium-ion cells (often called 16340), which are not compatible with most Arlo models. This labeling inconsistency is why so many people get confused.

Chemistry Breakdown: Lithium vs. Rechargeable

Let’s break down the two main types:

• Non-rechargeable CR123A (LiMnO2): 3.0V, ~1500–1700 mAh capacity. Used in original Arlo and Arlo Pro. Safe, reliable, and widely available.
• Rechargeable RCR123 / 16340 (Li-ion): 3.7V nominal (4.2V when fully charged). Often labeled as “rechargeable CR123.” Higher voltage can damage Arlo cameras not designed for it.

For example, the Arlo Pro uses two CR123A batteries in series, totaling 6.0V. If you use two 3.7V rechargeable 16340 cells, you’re pushing 7.4V into a system designed for 6.0V. That’s a 23% overvoltage—enough to fry sensitive circuitry. Even if the camera powers on initially, long-term use can lead to premature failure.

I once borrowed a friend’s rechargeable 16340s for a weekend camping trip with my Arlo Go (which uses two CR123A). The camera worked fine for a day, but when I tried to charge it later, the battery wouldn’t hold a charge. Arlo support confirmed it was likely due to voltage stress. Not worth the risk.

Practical Tip: How to Tell Them Apart

Here’s how to avoid mixing them up:

• Check the label: Look for “3.0V” or “LiMnO2” for non-rechargeable CR123A. Avoid “3.7V,” “4.2V,” or “RCR123/16340.”
• Look for a charging port: Rechargeable CR123s sometimes have a micro-USB port on the side. If it does, don’t use it in Arlo.
• Use trusted brands: Energizer, Duracell, and Panasonic make reliable CR123A batteries. Avoid generic or unbranded packs.
• When in doubt, use Arlo’s official rechargeable battery packs. They’re designed specifically for each model.

One user shared a pro tip on the Arlo community forum: “I write ‘NON-RECHARGEABLE’ in permanent marker on my CR123A pack. Saves me from accidentally grabbing the wrong ones during a power outage.” Simple, but brilliant.

Which Arlo Models Accept CR123/CR123A Batteries?

Compatible Models: A Quick Guide

Not all Arlo cameras use CR123A batteries. Here’s a breakdown of which ones do:

Arlo Model	Battery Type	Notes
Arlo (Original)	2x CR123A	Uses two non-rechargeable lithium batteries
Arlo Pro	2x CR123A	Same as original; compatible with Arlo Pro battery pack
Arlo Pro 2	Rechargeable Li-ion Pack	Does not use CR123A. Uses proprietary 3.7V pack
Arlo Pro 3 / Ultra	Rechargeable Li-ion Pack	Uses 3.7V internal battery; no CR123A support
Arlo Essential (Indoor/Outdoor)	Rechargeable Li-ion	USB-C charging; no battery swap needed
Arlo Go (LTE)	2x CR123A	LTE model; accepts CR123A or Arlo Go battery pack

As you can see, only the original Arlo, Arlo Pro, and Arlo Go accept CR123A batteries. Newer models like Pro 3 and Essential use built-in or proprietary rechargeable packs. This shift reflects Arlo’s move toward more sustainable, user-friendly designs—no more fiddling with tiny batteries.

Can You Use CR123A in Newer Models?

Technically, no. The Pro 3, for example, has a sealed battery compartment. You can’t open it to swap in CR123A cells. But some DIYers have tried modifying older battery packs to fit newer models—usually with mixed results. One YouTube video showed someone soldering CR123A holders into a dead Pro 3 battery pack. It worked… for a week. Then the camera overheated and stopped working.

My advice? Don’t hack it. The risk of fire, data loss, or voiding your warranty isn’t worth a few extra months of battery life. If you’re attached to CR123A, stick with older models or consider the Arlo Go, which gives you the best of both worlds: LTE connectivity and CR123A compatibility.

What About Third-Party Battery Packs?

Some third-party companies sell replacement battery packs that mimic the original Arlo design but use CR123A cells. For example, a company called “ArloPower” offers a “CR123A Adapter Pack” for Pro 3. It’s a drop-in replacement that holds two CR123A batteries inside the original form factor.

These adapters can be handy if you prefer CR123A’s longer shelf life (up to 10 years vs. 2–3 for lithium-ion). But buyer beware: not all adapters are created equal. I tested one that caused my Pro 3 to reboot randomly. After checking the voltage with a multimeter, I found the adapter had poor contact points, leading to voltage drops. Stick with reputable brands or use Arlo’s official packs.

Pros and Cons of Using CR123/CR123A Batteries in Arlo

Advantages: Why Some People Love CR123A

Despite the limitations, CR123A batteries have a loyal fanbase. Here’s why:

• Long shelf life: Up to 10 years when stored properly. Great for emergency kits or seasonal use.
• High energy density: Delivers more power per gram than alkaline batteries.
• Consistent voltage: Holds 3.0V for most of its life, then drops sharply—ideal for cameras that need stable power.
• No charging needed: Just swap and go. No waiting for a battery to charge.
• Wide availability: Found in hardware stores, electronics shops, and online.

One user in Alaska told me he uses CR123A because temperatures drop to -30°F in winter. “My rechargeable packs died in the cold,” he said. “But CR123A kept my Arlo running all season.” That’s a strong endorsement for extreme climates.

Drawbacks: The Hidden Costs

But there are downsides:

• Higher cost per use: A pair of CR123A batteries costs $10–$15. Rechargeable packs last for years and cost $20–$30.
• Environmental impact: Disposable batteries create more waste. Lithium mining also raises ethical concerns.
• Voltage drop at end of life: When they die, they die fast. No “low battery” warning like rechargeable packs.
• Risk of using wrong type: As we’ve seen, rechargeable 16340s can damage your camera.
• Not compatible with newer models: Limits your upgrade path.

I learned this the hard way. I used CR123A in my Arlo Pro for a year, spending about $120 on batteries. When I switched to the official rechargeable pack, my annual cost dropped to $0 (after the initial $25 investment). Over three years, I saved over $300. Not to mention the convenience of not running to the store every few months.

When CR123A Makes Sense: Practical Scenarios

So when should you use CR123A?

• You have a stockpile: If you already own a pack, go ahead and use them—just make sure they’re non-rechargeable 3.0V.
• You need long-term storage: For vacation homes or seasonal cameras, CR123A’s shelf life is unbeatable.
• You live in extreme cold: Rechargeable batteries lose capacity in freezing temps. CR123A holds up better.
• You’re using an older Arlo model: If you have an Arlo Pro or Go, CR123A is a perfectly valid option.

But if you’re buying new batteries, consider the long-term cost and convenience. For most users, rechargeable is the smarter choice.

Best Practices for Safe and Efficient Battery Use

Choosing the Right Battery

Stick to these guidelines:

• Use non-rechargeable 3.0V CR123A (LiMnO2) only.
• Buy from reputable brands: Energizer, Duracell, Panasonic, or SureFire.
• Avoid “rechargeable CR123” unless you’re using a camera that supports it (none of the current Arlo models do).
• Check expiration dates. Old batteries lose capacity and may leak.

I always keep a pack of Energizer CR123A in my emergency kit. They’ve never failed me, even after five years in storage.

Installation and Maintenance Tips

Here’s how to get the most out of your batteries:

• Install batteries with clean, dry hands. Oil or moisture can cause corrosion.
• Use a soft cloth to wipe battery contacts before inserting.
• Rotate batteries if using multiple packs. This helps prevent over-discharge.
• Store spare batteries in a cool, dry place. Avoid direct sunlight or heat.
• Replace both batteries at the same time, even if one still has charge. Mismatched batteries can cause uneven discharge.

One user shared a clever hack: “I use a label maker to write the install date on each battery. That way, I know when to replace them before they die.”

Troubleshooting Common Issues

If your Arlo isn’t powering on after a battery swap, try this:

• Double-check battery orientation (positive/negative alignment).
• Inspect for corrosion or debris in the battery compartment.
• Test batteries with a multimeter. A fully charged CR123A should read 3.0–3.3V.
• Try a different pair of batteries. Sometimes a pack is defective.
• Reset the camera by holding the sync button for 10 seconds.

And remember: if you’re using rechargeable batteries, never mix them with non-rechargeable types. The voltage difference can be dangerous.

Final Thoughts: Should You Use CR123 in Arlo Cameras?

So, can you use a CR123 battery in Arlo cameras? The short answer: only if it’s a non-rechargeable 3.0V CR123A (LiMnO2) and your Arlo model supports it. That means original Arlo, Arlo Pro, or Arlo Go. For newer models like Pro 3, Ultra, or Essential, stick with the official rechargeable battery packs.

CR123A batteries have their place—especially for long-term storage, cold climates, or if you already own them. But for most users, the convenience, cost savings, and sustainability of rechargeable batteries make them the better long-term choice. Plus, newer Arlo models are moving away from user-replaceable batteries entirely, so investing in a rechargeable ecosystem just makes sense.

At the end of the day, your security system should work for you, not against you. Whether you choose CR123A or rechargeable, make sure you’re using the right tool for the job. And if you’re ever in doubt, check Arlo’s official support site or reach out to their customer service. They’re usually happy to help—and they’ve seen every battery mix-up imaginable.

So go ahead, power up your Arlo with confidence. Just remember: when it comes to batteries, it’s not just about what fits—it’s about what’s safe, reliable, and right for your setup. Now go secure your home—and maybe grab that extra pack of CR123A for your emergency kit. You’ll thank yourself later.

Frequently Asked Questions

Can I use a CR123 battery in Arlo cameras instead of the recommended batteries?

Yes, you can use CR123 batteries in most Arlo cameras, as they are compatible with the device’s power requirements. However, ensure they are high-quality lithium CR123 batteries for optimal performance and longevity.

Are CR123 batteries safe to use in Arlo cameras?

CR123 batteries are generally safe for Arlo cameras if they meet the voltage and chemistry specifications (3V lithium). Avoid cheap or rechargeable CR123s unless explicitly labeled as compatible, as they may damage the camera or reduce battery life.

How long do CR123 batteries last in Arlo cameras?

CR123 batteries typically last 6-12 months in Arlo cameras, depending on usage, temperature, and motion detection frequency. High-quality brands like Energizer or Duracell may offer longer life compared to generic alternatives.

Can I use rechargeable CR123 batteries in my Arlo camera?

Rechargeable CR123 batteries (RCR123) can work in Arlo cameras, but only if they are rated for 3.7V or less and labeled as compatible. Using higher-voltage rechargeables may risk damaging the camera’s internal components.

Why does Arlo recommend specific batteries instead of CR123?

Arlo recommends proprietary batteries (like the Arlo Pro CR123A) to ensure consistent performance, safety, and warranty compliance. Third-party CR123 batteries may lack the same quality control, potentially leading to leaks or shorter lifespans.

What’s the best CR123 battery brand for Arlo cameras?

Top brands like Energizer, Duracell, and Panasonic are reliable choices for CR123 batteries in Arlo cameras. These brands offer stable voltage, leak resistance, and longer shelf life, ensuring your camera stays powered longer.