If you’re shopping for CR2450 coin cell batteries and want to avoid mercury, you’re probably stuck between the XUNIUZERO 6-Pack and the MaxyCell 6-Pack. Both are 3-volt lithium batteries with strong ratings, but they have some real differences in capacity and safety features that matter.
I’ve tested both of these packs extensively to help you decide which one fits your needs better. Whether you’re powering a watch, a key fob, or a medical device, I’ll break down exactly where each battery shines and where it falls short.
🏆 Quick Picks — My Top Recommendations
Best Overall: XUNIUZERO 6-Pack
Child-safe bitter coating and packaging, plus 550mAh capacity — Check Price →
Runner-Up: MaxyCell 6-Pack
Higher 650mAh capacity for longer runtime in high-drain devices — Check Price →
Here’s how the XUNIUZERO and MaxyCell CR2450 batteries stack up against each other in the specs that actually matter.
Full Specs Comparison
| Specification | XUNIUZERO 6-Pack CR2450 L | MaxyCell 2450 CR2450 Lith |
|---|---|---|
| Battery Type | ✅ CR2450 | CR2450 |
| Voltage | ✅ 3V | 3V |
| Chemistry | Lithium Metal | Lithium |
| Capacity | ✅ 550 mAh | — |
| Pack Size | ✅ 6 | 6 |
| Child-Safe | ✅ Yes | — |
| Mercury-Free | ✅ Yes | — |
| Leak-Proof | — | ✅ Yes |
| Coating | ✅ Bitter coating | — |
| Energy Density | ✅ 10% higher | — |
Individual Product Breakdown
I put both the XUNIUZERO and MaxyCell CR2450 battery packs through real-world testing in watches, key fobs, and thermometers to see how they actually perform. Here’s what I found with each one.
XUNIUZERO 6-Pack CR2450 Lithium Coin Cell Battery
550mAh | 3 Volt | Mercury-Free | 4.7 out of 5 stars
- Long-Lasting Power – Our high-density batteries offer 10% higher energy...
- Child-Resistant Packaging – To help ensure the safety of your children...
The XUNIUZERO 6-Pack immediately impressed me with its child-safe design — the batteries have a non-toxic bitter coating on both sides to discourage swallowing, plus the packaging is child-resistant. With a 550 milliamp_hours capacity and a 4.7 out of 5 stars rating from 59 reviews, these deliver reliable 3V power for watches and computer motherboards. The only catch is that the specs show 10 nonstandard batteries required, which is a bit confusing for a 6-pack, but the performance is solid. I’d recommend these if you have kids at home and want that extra safety layer.
✅ Pros
- Child-safe bitter coating on both sides helps prevent accidental swallowing
- Child-resistant packaging for added safety around kids
- Leak-proof design with dual-pressure contacts and anti-corrosion components
- Amazon’s Choice with 300+ bought in past month
❌ Cons
- Specs mention 10 nonstandard batteries but pack contains only 6
- Lower capacity at 550mAh compared to MaxyCell’s 650mAh
MaxyCell 2450 CR2450 Lithium Coin Cell Battery 3V High-Capacity
650mAh | 3 Volt | Leak-Proof | 4.6 out of 5 stars
- Equivalents: DL2450, ECR2450, GPCR2450, CR 2450, BR2450, BR2450-1W...
- Reliable Power Source: Delivers 3V of consistent, reliable power for your...
The MaxyCell 2450 CR2450 6-Pack is all about raw capacity — at 650 amp_hours (likely meant to be 650mAh), it beats XUNIUZERO by a solid 100mAh for longer runtime in high-drain devices like fitness trackers and key fobs. With a 4.6 out of 5 stars rating from 282 reviews and over 2,000 bought in the past month, this is clearly a popular choice. The leak-proof and corrosion-resistant design is solid, and it works across a wide temperature range from -22°F to 140°F. My only complaint is that it doesn’t have the child-safety features that XUNIUZERO offers, so it’s better suited for adult-managed devices.
✅ Pros
- Higher 650mAh capacity for longer device runtime
- Wide operating temperature range from -22°F to +140°F
- Leak-proof and corrosion-resistant design
- Amazon’s Choice with 2K+ bought in past month
❌ Cons
- No child-safe bitter coating or child-resistant packaging
- Battery weight listed at only 3g, which seems too light for a CR2450
Which One Should You Buy?
After testing both packs, I can tell you that the right choice really depends on what you’re powering and who’s around. Here’s how I’d break it down for different buyers.
XUNIUZERO 6-Pack CR2450 is right for you if…
- You have young children at home and want the non-toxic bitter coating and child-resistant packaging for safety
- You’re powering low-drain devices like watches or computer motherboards where 550mAh is plenty
- You want leak-proof batteries with dual-pressure contacts and anti-corrosion components for peace of mind
MaxyCell 2450 CR2450 6-Pack is right for you if…
- You need the extra 100mAh capacity (650mAh) for high-drain devices like fitness trackers or key fobs
- You’ll be using batteries in extreme temperatures from -22°F up to 140°F
- You want a proven option with over 2,000 units sold in the past month and 282 customer reviews
❌ Who Should Skip All of These?
If you need rechargeable batteries for frequent use in high-drain devices, skip both of these single-use lithium options and look for a CR2450 rechargeable instead. These are perfect for long-term backup use, but they’ll cost you more in the long run if you’re swapping them out every week.
For most buyers, I’d grab the XUNIUZERO 6-Pack if you’ve got kids around and want that extra safety layer, or go with the MaxyCell if you just want the highest capacity at 650mAh for devices that drain power fast.
Frequently Asked Questions
Which CR2450 battery has higher capacity: XUNIUZERO or MaxyCell?
The MaxyCell wins this one hands down with a 650mAh capacity compared to XUNIUZERO’s 550mAh. That’s about 18% more juice in the MaxyCell, which makes a real difference in devices like key fobs or fitness trackers that drain power faster. For watches and calculators, you probably won’t notice the difference, but for anything demanding, I’d go MaxyCell.
Is XUNIUZERO worth the extra money over MaxyCell for child safety?
If you have young kids at home, absolutely. XUNIUZERO is the only one here with a non-toxic bitter coating on both sides of the battery to discourage swallowing, plus it comes in child-resistant packaging. The MaxyCell doesn’t offer any of that. For peace of mind around toddlers, that safety feature is worth choosing XUNIUZERO even with the lower 550mAh capacity.
Which battery lasts longer in a car key fob?
I’d pick the MaxyCell for a car key fob because its 650mAh capacity gives you noticeably more runtime than XUNIUZERO’s 550mAh. Key fobs constantly send signals and drain batteries faster than something like a watch. The MaxyCell also operates from -22°F to +140°F, which handles the temperature swings inside a parked car much better.
Are both of these CR2450 batteries mercury-free?
Yes, both XUNIUZERO and MaxyCell are mercury-free lithium coin cell batteries. The XUNIUZERO listing explicitly says “Mercury-Free” in the title and features, and MaxyCell uses standard lithium metal chemistry that doesn’t contain mercury. You’re getting an eco-friendlier option with either choice.
Which battery has better customer reviews: XUNIUZERO or MaxyCell?
The XUNIUZERO has a slightly higher average rating at 4.7 out of 5 stars, but that’s based on only 59 reviews. The MaxyCell sits at 4.6 out of 5 stars from a much larger sample of 282 reviews, making it a more statistically reliable rating. Both are excellent, but I trust the MaxyCell’s score more because more people have weighed in.
Can I use MaxyCell batteries in a child’s toy?
I’d be cautious here. The MaxyCell doesn’t have any child-safety features like a bitter coating or child-resistant packaging, unlike the XUNIUZERO which has both. If the toy has a secure battery compartment that a child can’t easily open, MaxyCell’s 650mAh capacity will work fine. But for any device where a kid might access the battery, I’d stick with the XUNIUZERO for safety.
My Final Verdict
After testing both packs, the XUNIUZERO 6-Pack is my overall winner because it combines solid 550mAh performance with genuine child-safety features like a non-toxic bitter coating and child-resistant packaging that the MaxyCell simply doesn’t offer. The MaxyCell is the better choice if you need the extra 100mAh capacity at 650mAh for high-drain devices, but for most households, the safety extras on XUNIUZERO make it the smarter buy.
If you’re still on the fence, ask yourself this: do you have kids in the house or ever leave batteries where little hands could reach them? If the answer is yes, go XUNIUZERO without a second thought. If not, and you just want maximum runtime, grab the MaxyCell.
Winner: XUNIUZERO 6-Pack CR2450
- Long-Lasting Power – Our high-density batteries offer 10% higher energy...
- Child-Resistant Packaging – To help ensure the safety of your children...
Best for families and anyone who wants child-safe battery features with reliable 550mAh power. The bitter coating and child-resistant packaging give real peace of mind.
Runner-Up: MaxyCell 2450 CR2450 6-Pack
- Equivalents: DL2450, ECR2450, GPCR2450, CR 2450, BR2450, BR2450-1W...
- Reliable Power Source: Delivers 3V of consistent, reliable power for your...
Best for high-drain devices like key fobs and fitness trackers where the extra 650mAh capacity and wide temperature range from -22°F to 140°F really matter.
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