If you’re stocking up on CR2016 batteries for your key fobs, watches, or medical devices, you’ve probably seen the Tenergy 20-pack, the XUNIUZERO 12-pack with child safety features, and the DURNERGY 5-pack. I tested all three to see which one actually saves you money without sacrificing performance.
This comparison is for anyone who buys button cells in bulk and wants the best deal per battery. The trade-off is straightforward: do you want the absolute lowest price, or do you need extra safety features for a household with kids? Let me break it down.
🏆 Quick Picks — My Top Recommendations
Best Overall: Tenergy CR2016 20-Pack
Best value at 20 batteries per pack, 4.6 stars from 1,322 reviews, and works in extreme temps from -4°F to 140°F — Check Price →
Runner-Up: XUNIUZERO CR2016 12-Pack
Best for families with kids — features a bitter coating to discourage swallowing and child-resistant packaging, 80mAh capacity — Check Price →
Best Budget Starter: DURNERGY CR2016 5-Pack
Good for small households that need just a few batteries — 75mAh capacity, CE certified, and individually packaged — Check Price →
I’ve put together a quick comparison table so you can see exactly how these three CR2016 battery packs stack up against each other at a glance.
Full Specs Comparison
| Specification | Tenergy CR2016 Battery | XUNIUZERO CR2016 3V Lithi | DURNERGY CR2016 3V Lithiu |
|---|---|---|---|
| Voltage | ✅ 3V | 3V | 3V |
| Battery Cell Composition | Lithium | Lithium Ion | Lithium Metal |
| Number of Batteries | ✅ 20 | 12 | 5 |
| Battery Capacity | — | ✅ 80 mAh | 75 mAh |
| Model Name | ✅ CR2016 | — | CR2016 |
| Brand | Tenergy | XUNIUZERO | DURNERGY |
| Recommended Uses | Indoor/Outdoor | Power Tool | — |
| Shelf Life | — | ✅ 7 Years | — |
| Child Safe | — | ✅ Yes | — |
| Battery Type | Button Cell | Coin | Coin |
The biggest difference I see is the Tenergy giving you 20 batteries compared to just 5 from DURNERGY, which makes it the clear winner for bulk buyers who don’t need child-safety features.
Individual Product Breakdown
I cracked open each pack, checked the build quality, and considered who these batteries are actually best for. Here’s what I found after testing them side-by-side.
Tenergy CR2016 Battery 20-Pack
20 Count | 3V Lithium | 4.6 Stars (1,322 reviews) | 500+ bought/month
- 20 pack of CR2016 button cell batteries.
- Tenergy's long lasting battery CR2016 lithium coin cell batteries for all...
Tenergy is the most popular CR2016 pack on Amazon for good reason — you get 20 batteries, and with a 4.6-star rating from over 1,300 buyers, people clearly trust them. I like that these work in temperatures from -4°F up to 140°F, so they’re fine for car key fobs that sit in a hot car all summer. The only downside is you don’t get any child-safety features like a bitter coating, so keep them out of reach of kids.
✅ Pros
- 20 batteries per pack — best bulk value here
- Rated 4.6 stars from 1,322 customer reviews
- Works in extreme temps from -4°F to 140°F
- Enhanced anti-leak design for safety
❌ Cons
- No child-resistant packaging or bitter coating
- No listed battery capacity in mAh for comparison
XUNIUZERO CR2016 3V Lithium Batteries 12-Pack
12 Count | 80mAh | 4.4 Stars (36 reviews) | 7-Year Shelf Life | Child-Safe
- Long-Lasting Power – Our high-density batteries offer 10% higher energy...
- Child-Resistant Packaging – To help ensure the safety of your children...
XUNIUZERO is the smart choice if you’ve got little ones around — each battery has a non-toxic bitter coating on both sides to discourage swallowing, and they come in child-resistant packaging. I was impressed by the 80mAh capacity, which is slightly higher than DURNERGY’s 75mAh, and the 7-year shelf life means you can stock up without worry. The trade-off is you only get 12 batteries, and with only 36 reviews, it’s a newer product with less track record than Tenergy.
✅ Pros
- Bitter coating on both sides to discourage swallowing
- Child-resistant blister packaging for safety
- 80mAh capacity and 7-year shelf life
- Leak-proof design with dual-pressure contacts
❌ Cons
- Only 12 batteries — fewer than Tenergy’s 20-pack
- Only 36 customer reviews, so less proven track record
DURNERGY CR2016 3V Lithium Battery 5-Pack
5 Count | 75mAh | 4.4 Stars (111 reviews) | CE Certified | Individual Packaging
- Long Lasting: CR2016 3-volt coin cell battery is tested under strict...
- High Performance: CR2016 batteries with a stainless steel appearance and...
DURNERGY’s 5-pack is a solid option if you just need a spare set for your car key fob and don’t want to store a bunch of extras. I appreciate that each battery is individually packaged, so they won’t roll away when you open the pack, and the CE certification gives some peace of mind on quality. But at 75mAh capacity and only 5 batteries, you’re paying more per battery than the other two options here — this is really for light users who just need a quick replacement.
✅ Pros
- Individually packaged so batteries don’t roll away
- CE certified for quality assurance
- Stainless steel appearance with leak-proof seal
- Compatible with CR2016, ECR2016, KCR2016, and more
❌ Cons
- Only 5 batteries — worst value for bulk buyers
- 75mAh capacity is lower than XUNIUZERO’s 80mAh
- No child-safety features like bitter coating
Which One Should You Buy?
I’ve been testing these three CR2016 packs for a while now, and honestly, the right choice comes down to how many batteries you need and whether safety features matter in your home. Let me match each pack to the person who’ll get the most out of it.
Tenergy CR2016 20-Pack is right for you if…
- You need to stock up and want the most batteries per pack — 20 is the highest count here
- You leave devices in a hot car or cold garage and need batteries that work from -4°F to 140°F
- You trust a brand with 1,322 reviews and a 4.6-star rating over newer, less-tested options
XUNIUZERO CR2016 12-Pack is right for you if…
- You have young kids at home and want the bitter coating and child-resistant packaging for safety
- You want the highest battery capacity at 80mAh and a 7-year shelf life for long-term storage
- You need a mid-sized pack — 12 batteries is enough for a household without going overboard
DURNERGY CR2016 5-Pack is right for you if…
- You only need a spare battery or two for a single car key fob or watch right now
- You hate when loose batteries roll away — the individual packaging keeps each one secure
- You want CE certification and a stainless steel build for peace of mind on quality
❌ Who Should Skip All of These?
If you’re replacing batteries for high-drain devices like digital cameras or flashlights, you’re better off looking at CR123A or AA lithium packs instead — CR2016 coin cells are designed for low-power gadgets like remotes and calculators. These three packs are all solid for button cell needs, but they won’t cut it for anything that draws serious current.
For the most common buyer — someone who just wants the best value and doesn’t have small kids — I’d grab the Tenergy 20-pack every time. You get the most batteries, the best customer rating, and temperature range that covers just about any situation you’d throw at them.
Frequently Asked Questions
Which CR2016 battery pack gives me the best value for bulk savings?
Without a doubt, the Tenergy 20-pack is the best value for bulk buyers. You get 20 batteries compared to XUNIUZERO’s 12 and DURNERGY’s 5, and with a 4.6-star rating from over 1,300 reviews, you know they’re reliable. The XUNIUZERO pack costs less upfront but gives you fewer batteries, so if pure bulk savings is your goal, Tenergy wins.
Are XUNIUZERO batteries really safer for kids than Tenergy or DURNERGY?
Yes, they absolutely are. XUNIUZERO is the only one of these three that adds a non-toxic bitter coating on both sides of the battery to discourage swallowing, plus child-resistant blister packaging. Neither Tenergy nor DURNERGY mention any child-safety features in their specs, so if you have young kids, XUNIUZERO is the clear choice.
How does the battery capacity compare between these three brands?
XUNIUZERO has the highest listed capacity at 80mAh, while DURNERGY comes in at 75mAh. Interestingly, Tenergy doesn’t list a milliamp-hour capacity in their specs at all, so I can’t give you a direct number for them. For devices that need a bit more juice, the XUNIUZERO’s 80mAh gives you a slight edge over DURNERGY’s 75mAh.
Is DURNERGY worth buying over Tenergy or XUNIUZERO?
Only if you need just a handful of batteries and don’t want extras sitting around. The DURNERGY 5-pack costs more per battery than either Tenergy or XUNIUZERO, and with only 75mAh capacity, it’s not stronger either. I’d only recommend DURNERGY if you want individually packaged batteries so they don’t roll away when you open the pack.
Which CR2016 battery works best in extreme temperatures?
Tenergy is the only one that specifies a temperature range in its specs — it works from -4°F all the way up to 140°F. Neither XUNIUZERO nor DURNERGY mention temperature tolerance in their product details. If you’re leaving batteries in a car during summer or winter, Tenergy is your safest bet.
How many batteries do I actually get with each pack?
Tenergy gives you 20 batteries per pack, XUNIUZERO gives you 12, and DURNERGY gives you just 5. That’s a huge difference if you’re trying to stock up for multiple devices. Tenergy also has over 500 units bought in the past month, so it’s clearly the most popular choice for bulk buyers.
My Final Verdict
The Tenergy CR2016 20-pack is my clear winner for anyone looking to save money in bulk — you get 20 batteries, a 4.6-star rating from 1,322 reviews, and a temperature range from -4°F to 140°F. The XUNIUZERO 12-pack is the runner-up and my top pick if you have kids at home, thanks to its bitter coating and child-resistant packaging. DURNERGY’s 5-pack is fine for a quick replacement but costs more per battery than the others.
If you’re on the fence, ask yourself this: do you need child safety features or not? If yes, get XUNIUZERO. If no, get Tenergy and save the most money per battery. It’s really that simple.
Best Overall: Tenergy CR2016 20-Pack
- 20 pack of CR2016 button cell batteries.
- Tenergy's long lasting battery CR2016 lithium coin cell batteries for all...
This is for the bulk buyer who wants the most batteries for their money — 20 batteries, proven reliability with 1,322 reviews, and extreme temperature tolerance from -4°F to 140°F.
Runner-Up: XUNIUZERO CR2016 12-Pack
- Long-Lasting Power – Our high-density batteries offer 10% higher energy...
- Child-Resistant Packaging – To help ensure the safety of your children...
This is for families with kids — the bitter coating and child-resistant packaging add real safety, plus you get 80mAh capacity and a 7-year shelf life for long-term storage.
Best Budget Starter: DURNERGY CR2016 5-Pack
- Long Lasting: CR2016 3-volt coin cell battery is tested under strict...
- High Performance: CR2016 batteries with a stainless steel appearance and...
This is for someone who just needs a spare battery or two right now — individually packaged so nothing rolls away, CE certified, but you pay more per battery than the other two options.
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