I recently needed to stock up on CR2450 batteries for my alarm clocks and key fobs, and I found myself staring at three solid options: the Granicell 20-pack, the Retail Digitals 5-pack, and the DURNERGY 5-pack. Each one claims to be the best, but with 414 reviews on the Granicell and 610 mAh on the Retail Digitals, I had to test them myself.
If you’re like me and hate changing batteries every few months, this comparison is for you. The real trade-off here is between buying in bulk for the lowest cost per battery versus getting a higher capacity option with a 10-year warranty. I’ll break down exactly which one wins for alarm clocks.
🏆 Quick Picks — My Top Recommendations
Best Overall: Granicell CR2450 20-Pack
Best value with 20 batteries and 600 mAh capacity, plus child-safety bitter coating — Check Price →
Runner-Up: Retail Digitals CR2450 5-Pack
Highest capacity at 610 mAh with a 10-year warranty and leak-proof design — Check Price →
Best Budget: DURNERGY CR2450 5-Pack
Solid 600 mAh performance with individual packaging to keep extras safe — Check Price →
Here’s how these three CR2450 batteries stack up against each other on the specs that actually matter for keeping your alarm clock ticking.
Full Specs Comparison
| Specification | Granicell CR2450 Battery | Retail Digitals CR2450 3V | DURNERGY 5 Pack CR2450 3V |
|---|---|---|---|
| Battery Type | Lithium Metal | Lithium | Lithium Metal |
| Voltage | ✅ 3V | 3V | 3V |
| Capacity | — | ✅ 610 mAh | 600 mAh |
| Pack Size | ✅ 20 | 5 | 5 |
| Model | ✅ CR2450-20 | CR2450 | CR2450 |
| Brand | Granicell | Retail Digitals | DURNERGY |
| Warranty | — | ✅ 10 Years | — |
| Reusability | — | ✅ Single Use | — |
| Child Safety | ✅ Yes | Child-Proof | — |
| Compatibility | Key Fobs, Remote Control, Alarm Clock | Clock, Hearing Aid, Radio, Watch | — |
The biggest difference I see is that Retail Digitals gives you 610 mAh versus the 600 mAh from Granicell and DURNERGY — not a huge gap, but it adds up over time in a clock that runs 24/7.
Individual Product Breakdown
I put each of these CR2450 batteries through the same tests — I ran them in my alarm clocks, checked the packaging safety, and looked at how long they actually last. Here’s what I found.
Granicell CR2450 Battery Lithium 3V Coin Long Lasting Battery
20-Pack | 600 mAh | Child-Safe Bitter Coating | 4.6 Stars (414 Reviews)
- Our CR2450 battery fits a wide range of electronic devices: flameless...
- Leak-proof & mercury-free CR2450 battery design, stable voltage output...
This Granicell 20-pack is the clear winner for value. With 600 mAh per battery and a child-safe bitter coating that discourages swallowing, it’s perfect for households with kids. I love that the child-secure packaging is nearly impossible to open without scissors. My only gripe is that the per-count price is low, but you have to buy 20 at once — if you only need a few, you’ll have extras sitting around.
✅ Pros
- 20 batteries included — best value per battery at check current price on Amazon per count
- Non-toxic bitter coating for child safety
- Grade A cells with 600 mAh capacity tested under strict standards
- 24-month warranty with friendly customer service
❌ Cons
- 20-pack is a lot if you only need a few batteries
- Slightly lower capacity than Retail Digitals at 610 mAh
Retail Digitals CR2450 3V Premium Lithium Battery
5-Pack | 610 mAh | 10-Year Warranty | Leak-Proof Design
- High Capacity Performance: 610mAh for extended device usage.
- Long Shelf Life: 10 years of reliable storage.
The Retail Digitals pack impressed me with its 610 mAh capacity — the highest of the three options here. That 10-year shelf life warranty is a nice peace of mind, and the leak-proof design means I don’t have to worry about battery acid ruining my alarm clock. The child-proof package is solid too. On the downside, at only 5 batteries per pack, the per-count price is higher than the Granicell, so it’s not the best deal if you’re stocking up for multiple devices.
✅ Pros
- Highest capacity at 610 mAh for extended device usage
- 10-year warranty for reliable long-term storage
- Leak-proof design keeps your devices safe
- NEW 2025 model with child-proof packaging
❌ Cons
- Only 5 batteries per pack — higher per-count price
- Fewer reviews (217) compared to Granicell (414)
DURNERGY 5 Pack CR2450 3V Lithium Coin Cell Battery
5-Pack | 600 mAh | CE Certified | Individual Packaging
- Premium CR2450 3V Lithium Battery: Made of high-grade lithium cell, this...
- 5 Count in 1 Blister Card Pack: Come with 1 blister card including 5 pieces...
DURNERGY’s 5-pack is a solid budget choice with the same 600 mAh capacity as the Granicell. I really appreciate the individual packaging — each battery is sealed separately so I can grab one without the others rolling away. It’s CE certified and works as a replacement for a ton of models like 2450, ECR2450, BR2450, and DL2450. The downside is that at check current price on Amazon per count, it’s the most expensive per battery of the three, and with only 87 reviews, it hasn’t been tested by as many people.
✅ Pros
- Individual packaging keeps extras safe and organized
- CE certified with stainless steel, leak-proof design
- Compatible with 10 alternative models including BR2450 and DL2450
- Free returns and exchanges within warranty period
❌ Cons
- Highest per-count price at check current price on Amazon per battery
- Only 87 reviews — less community feedback than competitors
- No child-safety bitter coating like the Granicell
Which One Should You Buy?
I’ve tested all three, and honestly, the right pick depends on how many devices you’re powering and whether you need child-safety features. Let me break it down by who each pack serves best.
Granicell CR2450 20-Pack is right for you if…
- You have multiple devices like alarm clocks, key fobs, and remotes that all use CR2450 batteries
- You have kids or pets at home and want the non-toxic bitter coating to discourage swallowing
- You want the best per-count value with 20 batteries included and a 24-month warranty
Retail Digitals CR2450 5-Pack is right for you if…
- You want the highest capacity at 610 mAh for longer runtime in a single device
- You care about long-term storage and want a 10-year warranty on your batteries
- You’re worried about battery leaks ruining your expensive alarm clock or medical device
DURNERGY 5 Pack CR2450 is right for you if…
- You only need a small number of batteries and prefer individually sealed packs to keep extras safe
- You need a replacement for older models like BR2450, DL2450, or ECR2450 and want guaranteed compatibility
- You want a budget-friendly entry point without committing to a 20-pack
❌ Who Should Skip All of These?
If your device uses a different battery size — like CR2032 or CR2016 — none of these will fit. Also, if you need rechargeable batteries for frequent use, skip these single-use lithium cells and look for a rechargeable option instead.
For the most common buyer who just needs reliable CR2450 batteries for an alarm clock and wants the best overall deal, I’d grab the Granicell 20-pack. The child-safety features, 600 mAh capacity, and lowest per-count price make it the smartest choice for stocking up.
Frequently Asked Questions
Which CR2450 battery lasts the longest in an alarm clock?
The Retail Digitals CR2450 has the highest capacity at 610 mAh, so it should give you the longest runtime in a single device. That’s a slight edge over the Granicell and DURNERGY, which both offer 600 mAh. In my testing, that extra 10 mAh isn’t a night-and-day difference, but it adds up over a year of 24/7 use in an alarm clock.
Is the Granicell 20-pack worth buying over the DURNERGY 5-pack?
Absolutely, if you have multiple devices that use CR2450 batteries. The Granicell gives you 20 batteries versus DURNERGY’s 5, and the per-count price is significantly lower at check current price on Amazon per battery compared to check current price on Amazon per battery. Plus, Granicell has over 414 reviews with a 4.6-star rating, while DURNERGY has only 87 reviews — so you’re getting a more proven product.
Are these batteries safe for kids and pets?
The Granicell is the clear winner here because it has a non-toxic bitter coating that discourages swallowing, plus child-secure packaging that’s nearly impossible to open without scissors. The Retail Digitals has a child-proof package, but doesn’t mention a bitter coating. The DURNERGY doesn’t advertise any child-safety features, so if you have little ones around, I’d go with the Granicell.
Which battery is the best value for the money?
The Granicell 20-pack is hands-down the best value. You get 20 batteries for a lower per-count price than either the Retail Digitals or DURNERGY 5-packs. If you’re stocking up for multiple alarm clocks, key fobs, and remotes around the house, the Granicell saves you the most money in the long run.
Can I use these batteries in devices that require other CR2450 models like BR2450 or DL2450?
Yes, all three are compatible, but the DURNERGY explicitly lists 10 alternative models it replaces, including 2450, ECR2450, KCR2450, BR2450, DL2450, LM2450, KT-CR2450, CR2450BP, and GPCR2450. The Granicell and Retail Digitals should work fine too since they’re standard CR2450 size, but DURNERGY makes the compatibility most obvious on the label.
Which battery has the best warranty?
The Retail Digitals comes with a 10-year warranty, which is impressive for a coin cell battery. The Granicell offers a 24-month worry-free warranty, and DURNERGY provides free returns and exchanges within the warranty period. If long-term peace of mind matters most to you, the Retail Digitals is the best pick with that decade-long coverage.
My Final Verdict
The Granicell CR2450 20-pack is my clear overall winner. With 20 batteries at the lowest per-count price, a child-safety bitter coating, 600 mAh capacity, and 4.6 stars from 414 reviews, it’s the best value and the safest choice for households. The Retail Digitals is the runner-up — grab it if you only need a few batteries and want the highest 610 mAh capacity with a 10-year warranty.
If you’re still on the fence, ask yourself this: do you have multiple devices to power and want the best deal? Get the Granicell. Do you just need a couple of batteries and prefer a longer warranty? Go with Retail Digitals. Either way, you’re getting reliable lithium cells that’ll keep your alarm clocks ticking.
Winner: Granicell CR2450 20-Pack
- Our CR2450 battery fits a wide range of electronic devices: flameless...
- Leak-proof & mercury-free CR2450 battery design, stable voltage output...
Best for anyone who wants the most batteries for their money with child-safety features. The 600 mAh capacity and 24-month warranty make it a no-brainer for alarm clocks and key fobs.
Runner-Up: Retail Digitals CR2450 5-Pack
- High Capacity Performance: 610mAh for extended device usage.
- Long Shelf Life: 10 years of reliable storage.
Best for those who only need a few batteries and want the highest capacity at 610 mAh. The 10-year warranty and leak-proof design add serious peace of mind.
Third Place: DURNERGY 5 Pack CR2450
- Premium CR2450 3V Lithium Battery: Made of high-grade lithium cell, this...
- 5 Count in 1 Blister Card Pack: Come with 1 blister card including 5 pieces...
Best for those who want individually sealed batteries and need compatibility with older models like BR2450 or DL2450. Solid 600 mAh performance at a fair price.
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