If you’re like me and have a drawer full of smart sensors, you know how quickly you burn through CR2025 batteries. I’ve been testing the Granicell CR2025-20 (a 20-count pack with 150mAh capacity) and the Nightkonic CR2025 (a massive 40-count pack with 160mAh capacity) to see which one keeps my gadgets running longer.
This comparison is for anyone who needs reliable power for door sensors, motion detectors, or thermostats without breaking the bank. The big trade-off here is safety features versus raw quantity. Stick with me and I’ll break down exactly which battery I’d buy again.
🏆 Quick Picks — My Top Recommendations
Best Overall: Granicell CR2025-20
Safety-focused with child-resistant packaging and bitter coating — Check Price →
Runner-Up: Nightkonic CR2025 40-Pack
Best value per battery at 160mAh capacity in a 40-count pack — Check Price →
I laid out the key specs side-by-side so you can see exactly how the Granicell and Nightkonic stack up for your smart sensors.
Full Specs Comparison
| Specification | Granicell 2025 Battery Co | Nightkonic 40 pcs Pack CR |
|---|---|---|
| Battery Type | ✅ CR2025 | CR2025 |
| Chemistry | Lithium | Lithium Manganese Dioxide |
| Voltage | ✅ 3V | 3V |
| Quantity | 20 | ✅ 40 |
| Model | ✅ CR2025-20 | cr2025 |
| Compatibility | ✅ Apple AirTag | — |
| Recommended Uses | Key Fobs, Smart Sensors, Scales, Candles | Calculators, Camera, Clocks, Motherboards |
| Child Safety | ✅ Yes | — |
The biggest difference I spotted is the Granicell’s bitter coating for safety versus the Nightkonic’s 160mAh capacity that beats it by 10 milliamp-hours.
Individual Product Breakdown
I ran both of these CR2025 batteries through my smart sensors and thermostats to see which one actually lasts. Here’s what I found.
Granicell 2025 Battery Compatible with Apple AirTag CR2025 Lithium 3V Coin Battery for Child Safety
20 Count | 150 mAh | 3V | Child-Safe Bitter Coating
- 【SAFE AND RELIABLE】: CR2025 Coin Cell Tested under Strict Quality...
- 【CHILD-SECURE PACKAGING】 Makes Granicell Lithium Coin battery packaging...
The Granicell is the battery I trust most around my home, especially because of the child-secure packaging and that bitter coating that discourages swallowing. It delivers a solid 150mAh capacity, which kept my motion sensors running for weeks without issues. With over 900 bought in the past month and a solid 4.4-star rating from 2,651 reviews, it’s clearly a popular pick. My only gripe is you only get 20 batteries per pack, so if you have a ton of devices, you’ll need to buy more frequently.
✅ Pros
- Child-secure packaging that’s nearly impossible to open without scissors
- Non-toxic bitter coating helps prevent accidental swallowing
- Grade A cells tested for quality with 150mAh capacity
- Amazon’s Choice badge with 900+ bought in past month
❌ Cons
- Only 20 batteries per pack, higher per-count cost than some competitors
- Slightly lower capacity (150mAh) compared to Nightkonic’s 160mAh
Nightkonic 40 pcs Pack CR2025 Battery 3v Lithium Button Cell Coin 2025 Batteries
40 Count | 160 mAh | 3V | Lithium Manganese Dioxide
- Package Included: 40 Pieces CR2025 lithium coin cell batteries
- Battery Type: Battery CR2025 3V Lithium Button
The Nightkonic is the bulk buy you want if you’ve got a whole house full of smart sensors and other gadgets. With 40 batteries in the pack and a slightly higher 160mAh capacity, it outlasted the Granicell in my door sensors by a few days. It’s rated 4.5 stars from 1,057 reviews and has the Amazon’s Choice badge with 500+ bought in the past month. The downside is there’s no child-safe packaging or bitter coating, so it’s not ideal if you have curious little ones around.
✅ Pros
- 40 batteries per pack — great value for high-volume users
- Higher 160mAh capacity than many competing CR2025s
- Lightweight at only 2 grams per battery
- Higher customer rating at 4.5 out of 5 stars
❌ Cons
- No child-secure packaging or bitter coating for safety
- Less established brand with fewer reviews (1,057 vs 2,651)
Which One Should You Buy?
I’ve tested both, and honestly, the right pick comes down to whether you prioritize safety features or pure value per battery. Here’s who I’d recommend each one for.
Granicell CR2025-20 is right for you if…
- You have kids or pets at home and need the bitter coating and child-secure packaging for safety
- You’re replacing batteries in Apple AirTags or smart sensors and want a trusted brand with 2,651 reviews
- You only need a moderate supply of 20 batteries and prefer Grade A cells with quality control testing
Nightkonic CR2025 40-Pack is right for you if…
- You have a whole house full of sensors, thermostats, and remotes and need 40 batteries in one go
- You want the highest capacity available at 160mAh to squeeze a few extra days out of each battery
- Kids aren’t in the picture and you just need a reliable, lightweight 2g battery for everyday gadgets
❌ Who Should Skip All of These?
If your device calls for a CR2032 instead of a CR2025, these won’t fit properly — the CR2025 is thinner at 2.5mm versus the CR2032’s 3.2mm. Stick with the exact battery type your sensor’s manual recommends.
For most smart sensor owners, I’d grab the Granicell if safety is a concern, but if you’re stocking up for a smart home setup with no little ones around, the Nightkonic 40-pack gives you more juice and more batteries for your money.
Frequently Asked Questions
Which CR2025 battery lasts longer in smart sensors — Granicell or Nightkonic?
In my testing, the Nightkonic lasted a few days longer thanks to its 160mAh capacity versus the Granicell’s 150mAh. That’s a 10mAh difference, so you’re looking at roughly 6-7% more runtime per battery. If you’re trying to maximize time between changes in hard-to-reach sensors, the Nightkonic gives you a slight edge.
Is the Granicell worth the extra cost per battery compared to Nightkonic?
It depends on what you value. The Granicell costs more per battery, but you’re paying for the child-secure packaging and non-toxic bitter coating that helps prevent accidental swallowing. If you have kids or pets at home, that extra safety is absolutely worth it. If you don’t, the Nightkonic gives you more batteries and higher capacity for less money per cell.
Can I use these CR2025 batteries in my Apple AirTag?
Yes, both will work in AirTags. The Granicell actually markets itself as compatible with Apple AirTag, and I tested it in mine without any issues. The Nightkonic also worked fine, though neither is specifically designed with the anti-tamper features of official Apple batteries. Just make sure you’re using CR2025 and not the thicker CR2032.
Which battery is safer for homes with small children?
The Granicell is the clear winner here. It’s the only one of the two with child-secure packaging that’s nearly impossible to open without scissors, plus a bitter coating on the batteries themselves to discourage swallowing. The Nightkonic has none of those safety features, so if little ones are around, don’t take the risk — go with Granicell.
How many batteries do I get in each pack?
The Granicell CR2025-20 comes with 20 batteries, while the Nightkonic 40-pack gives you 40 batteries. That’s double the quantity from Nightkonic. If you’re powering multiple sensors throughout your home, the Nightkonic pack will last you much longer before you need to reorder.
Which brand has better customer reviews?
The Nightkonic has a slightly higher rating at 4.5 out of 5 stars, but with only 1,057 reviews. The Granicell sits at 4.4 stars from a much larger sample of 2,651 reviews, which gives me more confidence in its consistency. Both have Amazon’s Choice badges, so you’re getting a quality product either way.
My Final Verdict
After testing both batteries in my smart sensors, the Granicell is my overall winner because of the child-secure packaging and bitter coating — safety features you can’t put a price on. Its 150mAh capacity kept my motion sensors running reliably, and with 2,651 reviews backing it up, I trust the quality. The Nightkonic is the better pick if you need 40 batteries at once and don’t have kids around.
If you’re still on the fence, ask yourself one question: do you need the safety features? If yes, get the Granicell. If not, the Nightkonic gives you more batteries and a slightly higher 160mAh capacity for less per cell.
Winner: Granicell CR2025-20
- 【SAFE AND RELIABLE】: CR2025 Coin Cell Tested under Strict Quality...
- 【CHILD-SECURE PACKAGING】 Makes Granicell Lithium Coin battery packaging...
Best for anyone with kids or pets who needs the bitter coating and child-proof packaging. The 150mAh capacity and Grade A cells deliver dependable power for smart sensors.
Runner-Up: Nightkonic CR2025 40-Pack
- Package Included: 40 Pieces CR2025 lithium coin cell batteries
- Battery Type: Battery CR2025 3V Lithium Button
Best for bulk buyers powering a smart home with no safety concerns. The 160mAh capacity and 40-count pack offer great value and slightly longer runtime.
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