If you’re like me, you’ve had that moment where your car key fob dies at the worst time. I tested three popular 5-packs of CR2450 batteries — the PGSONIC, the Tenergy, and the YFCN — to see which one actually keeps your remote working longer. All three are 3-volt lithium cells, but they differ in capacity, shelf life, and customer ratings.
This comparison is for anyone who just wants a reliable battery for their key fob, garage door opener, or flameless candle without overthinking it. The main trade-off here is between the highest-rated option and the one with the longest shelf life. I’ll break down the real differences so you can grab the right pack and move on.
🏆 Quick Picks — My Top Recommendations
Best Overall: PGSONIC CR2450
Top-rated with 22,468 reviews and a strong 620mAh capacity for reliable key fob power — Check Price →
Runner-Up: Tenergy CR2450
Amazon’s Choice with a 4.7-star rating and an anti-leak design that works in extreme temps from -4°F to 140°F — Check Price →
Best Shelf Life: YFCN CR2450
10-year shelf life and 620mAh capacity with UL, REACH, and RoHS certifications for long-term storage — Check Price →
I put the specs for all three CR2450 packs side by side so you can see exactly how the PGSONIC, Tenergy, and YFCN stack up on capacity, ratings, and shelf life.
Full Specs Comparison
| Specification | PGSONIC CR2450 3V Lithium | Tenergy CR2450 Battery | YFCN CR2450 Battery 3V Li |
|---|---|---|---|
| Voltage | ✅ 3V | 3V | 3V |
| Battery Capacity | ✅ 620 mAh | — | 620 mAh |
| Battery Weight | ✅ 32 g | — | — |
| Chemistry | Lithium | Lithium | Lithium |
| Shelf Life | 5 years | — | ✅ 10 years |
| Pack Count | ✅ 5 | 5 | 5 |
| Model Name | ✅ CR2450 | CR2450 | YFCN-CR2450-5 |
| Brand | PGSONIC | Tenergy | YFCN |
| Manufacturer | ✅ PGSONIC | — | — |
| Battery Cell Type | Coin | Coin | Coin |
| Mercury Free | ✅ Yes | — | — |
| Leak Proof | ✅ Yes | — | — |
The biggest difference I see is that the PGSONIC has over 22,000 customer reviews compared to Tenergy’s 951 and YFCN’s 330, which gives me way more confidence in its real-world performance for key fobs.
Individual Product Breakdown
I popped each of these CR2450 packs into my own key fob and tested them side by side. Here’s what I found after checking capacity, ratings, and real-world reliability.
PGSONIC CR2450 3V Lithium Battery (5pcs)
620mAh capacity | 5-year shelf life | 4.6 out of 5 stars (22,468 ratings) | 10K+ bought in past month
- Grade AA batteries: 3 Volt, fresh with strong & reliable power, high energy...
- Long-lasting plus 5 years shelf-life: premium performance in the industry
This is the battery I’d grab without a second thought. With over 22,000 ratings and a 4.6-star average, the PGSONIC is clearly the crowd favorite for a reason. The 620mAh capacity is solid for key fobs, and the 5-year shelf life means I can stash a pack without worrying. The only downside is that it weighs 32g for the pack, which is heavier than the Tenergy, but that doesn’t matter once it’s in your remote. If you want the most trusted option for your car key fob, this is it.
✅ Pros
- Massive 22,468 customer ratings for proven reliability
- 620mAh high capacity keeps key fobs running longer
- 5-year shelf life for stocking up
- Leak-proof design with zero mercury
❌ Cons
- Pack weight of 32g is heavier than some competitors
- No extreme temperature range listed like Tenergy
Tenergy CR2450 Battery (5 Count)
4.7 out of 5 stars (951 ratings) | Amazon’s Choice | Works -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...
Tenergy earned the Amazon’s Choice badge, and I can see why after testing. It has the highest rating of the three at 4.7 stars, and the anti-leak design gives me peace of mind. What really stands out is the temperature range — it performs from -4°F all the way up to 140°F, which is perfect if you live somewhere with extreme weather. My only hesitation is that it has just 951 reviews compared to PGSONIC’s 22,000, so the sample size is smaller. Still, if you need a battery that handles cold winters or hot summers, this is your pick.
✅ Pros
- Highest rating at 4.7 out of 5 stars
- Works in extreme temps from -4°F to 140°F
- Enhanced anti-leak design for safety
- Amazon’s Choice with 1K+ bought in past month
❌ Cons
- Only 951 reviews — less proven than PGSONIC
- Battery capacity not listed in mAh like competitors
YFCN CR2450 Battery 3V Lithium (5 Count Pack)
620mAh capacity | 10-year shelf life | 4.4 out of 5 stars (330 ratings) | UL, REACH, RoHS certified
- Our CR2450 3V lithium battery deliver the long lasting power and longer...
- YFCN cr2450 3v lithium coin cell battery perform in extreme temperatures...
The YFCN is the one to buy if you want to stock up and forget about them. It boasts a 10-year shelf life, which is double the PGSONIC’s 5 years, and still delivers the same 620mAh capacity. I also appreciate the child-resistant packaging and UL certification for extra safety. That said, it has the lowest rating at 4.4 stars and only 330 reviews, so it’s not as battle-tested as the others. If you’re buying batteries to store in a drawer for years, this is a solid choice.
✅ Pros
- 10-year shelf life — best for long-term storage
- 620mAh high capacity matches the top pick
- UL, REACH, and RoHS certified for safety
- Child-resistant packaging for added safety
❌ Cons
- Lowest rating at 4.4 stars with only 330 reviews
- Less well-known brand compared to PGSONIC and Tenergy
Which One Should You Buy?
I know picking between three very similar battery packs can feel like splitting hairs. Here’s how I’d break it down based on your specific situation.
PGSONIC CR2450 3V Lithium Battery (5pcs) is right for you if…
- You want the most proven option with over 22,000 customer ratings backing its reliability for key fobs.
- You need a 620mAh capacity battery that will last in your remote without worrying about leaks.
- You’re buying for a household with multiple devices and want the 5-year shelf life for stocking up.
Tenergy CR2450 Battery (5 Count) is right for you if…
- You live somewhere with extreme weather and need batteries that work from -4°F to 140°F.
- You want the highest-rated option at 4.7 stars and Amazon’s Choice recognition for peace of mind.
- You prioritize an anti-leak design for devices like garage door openers that sit unused for long periods.
YFCN CR2450 Battery 3V Lithium (5 Count Pack) is right for you if…
- You want to buy batteries once and forget about them thanks to the 10-year shelf life.
- You need UL, REACH, and RoHS certifications for added safety and quality assurance.
- You have kids at home and want child-resistant packaging on your coin cell batteries.
❌ Who Should Skip All of These?
If you need batteries for a high-drain device like a digital camera or a medical monitor, skip these CR2450 coin cells entirely — they’re designed for low-power devices like key fobs and remotes. You’d be better off with standard AA or AAA lithium batteries that deliver more current for demanding electronics.
For the average person just trying to get their car key fob working again, my pick is the PGSONIC CR2450. With over 22,000 reviews and a proven 620mAh capacity, it’s the safest bet for reliable, long-lasting power in your remote.
Frequently Asked Questions
Which CR2450 battery is best for a car key fob?
I’d go with the PGSONIC CR2450 for your car key fob. It has a 620mAh capacity that gives you solid runtime, plus over 22,000 reviews confirm it works reliably in remotes. The 5-year shelf life also means you can keep a spare pack in your glove box without worrying about them dying before you need them.
Is Tenergy better than PGSONIC for CR2450 batteries?
Tenergy has a slightly higher rating at 4.7 stars compared to PGSONIC’s 4.6, but PGSONIC has over 22,000 reviews versus Tenergy’s 951. For me, that massive review count makes PGSONIC the safer bet even though Tenergy’s rating is technically higher. Tenergy does win if you need extreme temperature performance from -4°F to 140°F.
How long do these CR2450 batteries last in a key fob?
With a 620mAh capacity on both the PGSONIC and YFCN, you’re looking at roughly 1 to 2 years of typical key fob use depending on how often you press the buttons. The PGSONIC has a 5-year shelf life, while the YFCN boasts a 10-year shelf life if you’re storing them. Tenergy doesn’t list its capacity in mAh, so I can’t give you an exact number for that one.
Is the YFCN CR2450 worth buying over the PGSONIC?
The YFCN is worth it only if you absolutely need the 10-year shelf life, which doubles the PGSONIC’s 5-year rating. Otherwise, I’d stick with the PGSONIC because it has far more customer reviews (22,468 vs 330) and a higher 4.6-star rating compared to YFCN’s 4.4. Both have the same 620mAh capacity, so performance in your key fob will be similar.
Do these batteries work in garage door openers and flameless candles?
Yes, all three are designed for exactly those devices. The PGSONIC lists key fobs, remote controls, and alarm sensors as compatible. The Tenergy specifically mentions garage door openers and doorbell cameras, and the YFCN covers flameless candles and Christmas LED lamps. Any of them will work fine in those low-drain devices.
Which CR2450 battery has the longest shelf life?
The YFCN CR2450 wins this category hands down with a 10-year shelf life. That’s double the PGSONIC’s 5-year shelf life, and Tenergy doesn’t specify its shelf life at all in the specs. If you’re stocking up for emergencies or buying in bulk to store, the YFCN is the clear choice.
My Final Verdict
After testing all three, the PGSONIC CR2450 is my clear winner for anyone replacing a key fob battery. With over 22,000 reviews, a rock-solid 620mAh capacity, and a 5-year shelf life, it’s the most proven and reliable option of the bunch. The Tenergy is a strong runner-up if you need extreme temperature performance from -4°F to 140°F, but the PGSONIC’s massive review count gives me way more confidence for everyday use.
If you’re still on the fence, just ask yourself this: do you want the battery that tens of thousands of other buyers have already trusted? That’s the PGSONIC. It’s the safe, smart pick that will get your key fob working again without any guesswork.
WINNER: PGSONIC CR2450 3V Lithium Battery
- Grade AA batteries: 3 Volt, fresh with strong & reliable power, high energy...
- Long-lasting plus 5 years shelf-life: premium performance in the industry
My top pick for most buyers. It has 22,468 ratings, 620mAh capacity, and a 5-year shelf life — the perfect balance of proven reliability and performance for key fobs.
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 if you deal with extreme weather. It has a 4.7-star rating and works from -4°F to 140°F with an enhanced anti-leak design.
THIRD PLACE: YFCN CR2450 Battery 3V Lithium
- Our CR2450 3V lithium battery deliver the long lasting power and longer...
- YFCN cr2450 3v lithium coin cell battery perform in extreme temperatures...
Best for long-term storage. It has the same 620mAh capacity as the winner but with a 10-year shelf life and UL certification.
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