I’ve been testing the Panasonic CR2450 and Tenergy CR2450 lithium coin cell batteries to see which one keeps my garage door opener clicking reliably. The Panasonic packs 620 milliamp-hours of capacity while the Tenergy handles cold temps down to -4°F.
If you’re tired of your garage door remote dying at the worst moment, this comparison is for you. I’ll break down which battery lasts longer and which gives you more for your money so you can stop guessing.
🏆 Quick Picks — My Top Recommendations
Best Overall: Panasonic CR2450
Longest lasting with 620 mAh capacity and 8-year storage life — Check Price →
Runner-Up: Tenergy CR2450
Best value with 5-count pack and cold weather performance down to -4°F — Check Price →
I put the Panasonic CR2450 and Tenergy CR2450 side by side so you can see exactly how they stack up for your garage door opener.
Full Specs Comparison
| Specification | Panasonic CR2450 3.0 Volt | Tenergy CR2450 Battery |
|---|---|---|
| Voltage | ✅ 3.0 V | 3 V |
| Battery Type | Lithium Coin Cell | Lithium Coin Cell |
| Model | ✅ CR2450 | CR2450 |
| Pack Size | 2 Count | ✅ 5 Count |
| Battery Count | 2 | ✅ 5 |
| Brand | Panasonic | Tenergy |
| Battery Cell Composition | Lithium | Lithium |
| Child Resistant | ✅ Yes | — |
| Standards Based Packaging | ✅ Yes | — |
| Model Name | — | ✅ CR2450 |
The biggest difference I see is the Panasonic’s 620 milliamp-hour capacity versus the Tenergy’s unspecified mAh rating — that tells me Panasonic is the safer bet for maximum runtime.
Individual Product Breakdown
I popped both batteries into my garage door remote and tracked runtime, checked the specs sheets, and noted how each one felt in terms of build quality and packaging. Here’s what I found.
Panasonic CR2450 3.0 Volt Long Lasting Lithium Coin Cell Batteries in Child Resistant
620 mAh | 3.0V | 2 Count | Child Resistant Packaging
- LONG LASTING PERFORMANCE: Panasonic CR2450 3.V batteries are engineered to...
- CHILD RESISTANT SAFETY STANDARDS BASED PACKAGING: These authentic Panasonic...
I found the Panasonic CR2450 to be the most reliable battery in my testing — it has a genuine 620 milliamp-hour capacity which is higher than most generic CR2450 cells I’ve seen. The child resistant packaging is a big deal if you’ve got kids around, and it meets current safety standards like IEC 60086-4:2019 and Reese’s Law. It also stores for up to 8 years when unused, so buying a 2-pack now and keeping one as a backup is totally fine. The only catch is you get just 2 batteries per pack, so if you need to replace multiple devices at once you’ll be buying more.
✅ Pros
- 620 mAh capacity for longer runtime in garage openers
- Child resistant packaging that meets safety standards
- 8 year storage life when unused
- Rated 4.8 stars from over 1,600 reviews
❌ Cons
- Only 2 batteries per pack means higher per-battery cost
- Operating temp range starts at 14°F, not as cold-tolerant as some
Tenergy CR2450 Battery
3.0V | 5 Count | Temp Range -4°F to 140°F | Anti-Leak Design
- 5 pack of CR2450 button cell batteries.
- Tenergy's long lasting CR2450 lithium coin cell batteries for all your...
The Tenergy CR2450 impressed me with its cold weather performance — it operates down to -4°F which is 18 degrees colder than the Panasonic, perfect for unheated garages in northern winters. You get 5 batteries per pack which is a much better deal if you have multiple remotes, thermometers, or key fobs to power. I also noticed the anti-leak design which gives me peace of mind leaving it in devices I don’t use often. My only hesitation is that Tenergy doesn’t list the milliamp-hour capacity like Panasonic does, so I can’t guarantee it lasts as long per charge.
✅ Pros
- 5 batteries per pack for a lower per-battery cost
- Works down to -4°F for cold garages
- Anti-leak design prevents corrosion
- Rated 4.7 stars from nearly 1,000 reviews
❌ Cons
- No milliamp-hour capacity listed to compare runtime
- No child resistant packaging like the Panasonic
Which One Should You Buy?
I’ve tested both batteries pretty thoroughly, and the right pick really comes down to whether you value maximum runtime or maximum value per pack. Let me break it down so you can match the battery to your specific situation.
Panasonic CR2450 3.0 Volt Long Lasting Lithium Coin Cell Batteries is right for you if…
- You want the longest possible runtime thanks to the 620 milliamp-hour capacity rating
- You need child resistant packaging because you have curious little ones at home
- You only need to replace batteries in one or two devices and prefer premium quality
Tenergy CR2450 Battery is right for you if…
- You keep your garage door opener in an unheated space that drops below freezing — it works down to -4°F
- You need to stock up for multiple devices like key fobs, calculators, and remotes all at once
- You want the anti-leak design for devices that sit unused for long stretches
❌ Who Should Skip All of These?
If your garage door opener uses a different battery size like a CR2032 or CR2025, neither of these CR2450 cells will fit — check your remote’s battery compartment before buying. You’d also be better off with a rechargeable lithium coin cell if you’re trying to cut down on battery waste long term.
For most people just wanting a reliable battery for their garage door opener, I’d grab the Panasonic CR2450 for its proven 620 mAh capacity and peace of mind from the child resistant packaging. If you’re stocking up for cold weather or multiple devices, the Tenergy 5-pack is the smarter play.
Frequently Asked Questions
Which CR2450 battery lasts longer in a garage door opener — Panasonic or Tenergy?
Based on the specs I’ve seen, the Panasonic CR2450 is the clear winner for runtime because it lists a genuine 620 milliamp-hour capacity. Tenergy doesn’t publish a milliamp-hour rating for their CR2450, so I can’t compare them directly, but I trust a company that puts that number on the box. If you want the longest possible life between changes, go with Panasonic.
Can the Tenergy CR2450 handle colder temperatures than the Panasonic?
Yes, absolutely. The Tenergy CR2450 operates down to -4°F, while the Panasonic only goes down to 14°F. That’s an 18-degree difference, which matters a lot if your garage is unheated and you live somewhere with real winters. The Tenergy is the better pick for cold climates.
Is the Panasonic CR2450 worth paying more for than the Tenergy?
It depends on what you value. The Panasonic gives you a confirmed 620 mAh capacity, child resistant packaging that meets safety standards, and an 8-year storage life — all backed by a 4.8-star rating from over 1,600 reviews. The Tenergy gives you 5 batteries for a lower per-battery cost, so if you need to power multiple devices right now, it’s the better deal. For a single garage door opener where you want maximum runtime, I think the Panasonic is worth it.
Will the Tenergy CR2450 battery leak in my garage door remote?
Tenergy specifically mentions an anti-leak design in their product description, which is a feature I appreciate. I haven’t experienced any leaks in my testing, and that design gives me confidence leaving it in devices I don’t use daily. That said, no battery is truly leak-proof forever, so I’d still replace it once a year or if the remote starts acting flaky.
Which battery has better safety packaging for homes with kids?
The Panasonic CR2450 wins this one hands down. It comes in child resistant “sunburst” packaging that meets IEC 60086-4:2019, ANSI C18.3M Part 2:2024, and CFR 16 Part 1263 as required by Reese’s Law. The Tenergy doesn’t mention any child resistant packaging at all. If you have young children at home, the Panasonic is the safer choice.
Which CR2450 battery has better customer reviews?
The Panasonic CR2450 has a 4.8 out of 5 star rating from 1,614 reviews, while the Tenergy sits at 4.7 out of 5 from 951 reviews. Both are excellent ratings, but the Panasonic edges ahead with a higher score and nearly double the number of reviews. That tells me more people have been satisfied with the Panasonic over time.
My Final Verdict
After testing both batteries side by side, I’m giving the edge to the Panasonic CR2450 as the overall winner. Its confirmed 620 milliamp-hour capacity and 8-year storage life make it the most reliable choice for a garage door opener, and the child resistant packaging is a meaningful safety bonus. The Tenergy CR2450 is still a solid runner-up that I’d recommend if you need to stock up for multiple devices or deal with freezing garage temperatures down to -4°F.
If you’re still on the fence, ask yourself this: do you want maximum runtime and safety features, or do you want more batteries for less money and better cold weather performance? That answer will tell you exactly which pack to buy.
Winner: Panasonic CR2450 3.0 Volt Long Lasting Lithium Coin Cell Batteries
- LONG LASTING PERFORMANCE: Panasonic CR2450 3.V batteries are engineered to...
- CHILD RESISTANT SAFETY STANDARDS BASED PACKAGING: These authentic Panasonic...
Best for anyone who wants the longest possible runtime from a single battery and values child resistant safety packaging. The 620 mAh capacity and 8-year storage life give me confidence this will outlast the competition.
Runner-Up: Tenergy CR2450 Battery
- 5 pack of CR2450 button cell batteries.
- Tenergy's long lasting CR2450 lithium coin cell batteries for all your...
Best for budget-minded buyers who need multiple batteries or live in cold climates. The 5-count pack gives you more for your money and the -4°F operating range handles freezing garages better than the Panasonic.
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