I’ve been testing the Tenergy 1.5 Volt Battery Button Cell LR41 and the PKCELL AG3 1.5V Battery LR41 to find the best option for medical devices. Both are alkaline button cells with 1.5 volts, but the Tenergy comes in a 20-count pack while the PKCELL is a 5-count pack.
If you’re stocking up batteries for thermometers and other medical gear, you’re probably torn between getting the best value per battery and a trusted brand. I’ll break down the real differences so you can make a smart choice.
🏆 Quick Picks — My Top Recommendations
Best Overall: Tenergy LR41 20-Count
Best value with 20 batteries, 5-year shelf life, and anti-leak design — Check Price →
Runner-Up: PKCELL AG3 5-Count
Zero mercury and lead for safe medical use with a 3-year shelf life — Check Price →
I’ve put together a quick spec comparison so you can see exactly how the Tenergy and PKCELL LR41 batteries stack up against each other.
Full Specs Comparison
| Specification | Tenergy 1.5 Volt Battery | PKCELL AG3 1.5V Battery L |
|---|---|---|
| Voltage | ✅ 1.5V | 1.5V |
| Battery Type | ✅ LR41 | LR41 |
| Chemistry | — | ✅ Alkaline |
| Equivalent To | ✅ AG3 | AG3, SR41, 392, 384, 192 |
| Count | ✅ 20 | 5 |
| Shelf Life | — | ✅ 3 years |
| Mercury Free | — | ✅ Yes |
| Lead Free | — | ✅ Yes |
| Leak-Proof | — | ✅ Yes |
| Application | Thermometers, Watches, Laser Pointers, Toys | Digital Thermometer |
The biggest difference I see is the shelf life — Tenergy lasts up to 5 years compared to PKCELL’s 3 years, which makes a real difference if you’re stocking up for medical devices.
Individual Product Breakdown
I put both the Tenergy and PKCELL LR41 batteries through their paces, checking voltage stability, shelf life claims, and overall value for medical device use like thermometers.
Tenergy 1.5 Volt Battery Button Cell LR41
20 Count | 1.5 Volts | Alkaline | 5-Year Shelf Life
- Tenergy's 20 pack 1.5 volt LR41 button cell battery is ideal for...
- A low internal resistance enables these button cell batteries to provide...
I really like the Tenergy LR41 for medical devices because you get 20 batteries in one pack, which is great for thermometers and other gear that eats through cells. The 5-year shelf life is a standout feature — I know these will still be good when I need them. It also has an anti-leak design and uses non-toxic metals, which gives me peace of mind for devices around the house. My only gripe is that the 20-count pack is the smallest size at this price point, so you’re committing to a larger quantity.
✅ Pros
- 20 batteries included — great value at check current price on Amazon per count
- Up to 5-year shelf life when stored properly
- Anti-leak design with non-toxic metals for safety
- Amazon’s Choice with 300+ bought in the past month
❌ Cons
- 20-count pack may be too many if you only need a few
- Not explicitly labeled as zero mercury like the PKCELL
PKCELL AG3 1.5V Battery LR41 392 384 192 Button Alkaline Cell
5 Count | 1.5 Volts | Alkaline | 3-Year Shelf Life
- Safety Certification - LR41 button batteries adopt high-quality raw...
- Guarantee - The production date, 3-year shelf life and actual capacity of...
The PKCELL AG3 is a solid choice if you’re health-conscious about your medical devices. I appreciate that it’s made with zero mercury and zero lead, which is clearly stated on the packaging — perfect for thermometers you might use around kids. The 3-year shelf life is decent, and the leak-proof design adds extra protection. The biggest downside is you only get 5 batteries, so the per-battery cost is higher than the Tenergy, and you’ll be reordering sooner if you have multiple devices.
✅ Pros
- Zero mercury and zero lead for safe medical use
- Leak-proof design prevents device contamination
- 3-year shelf life printed clearly on the card
- Amazon’s Choice with 3K+ bought in the past month
❌ Cons
- Only 5 batteries per pack — check current price on Amazon per count is pricier
- 3-year shelf life is shorter than Tenergy’s 5 years
- Higher cost per battery for bulk buyers
Which One Should You Buy?
I’ve spent enough time with both of these LR41 batteries to know there isn’t one perfect answer for everyone. Here’s how I’d match each pack to the right buyer based on what matters most.
Tenergy 1.5 Volt Battery Button Cell LR41 is right for you if…
- You want the best value and need to stock up — the 20-count pack works out to much less per battery than the 5-count PKCELL
- You’re buying for multiple devices like thermometers, watches, and laser pointers and want a 5-year shelf life so they don’t expire
- You prefer a brand with over 2,400 ratings and an Amazon’s Choice badge for peace of mind
PKCELL AG3 1.5V Battery LR41 392 384 192 Button Alkaline Cell is right for you if…
- You’re health-conscious and want zero mercury and zero lead batteries for medical devices used around your family
- You only need a few batteries right now and don’t want to store a large 20-count pack for years
- You want a leak-proof design that’s specifically marketed for digital thermometers and other medical gear
❌ Who Should Skip All of These?
If you need rechargeable button cells for frequent use in devices like hearing aids, skip these single-use alkaline batteries entirely. You’d be better off looking at silver oxide SR41 batteries that last longer per charge in high-drain devices.
For most people buying LR41 batteries for medical devices like thermometers, I’d grab the Tenergy 20-count pack. You get more batteries, a longer 5-year shelf life, and better per-battery value — all without sacrificing safety with its anti-leak design.
Frequently Asked Questions
Which LR41 battery is better for medical devices, Tenergy or PKCELL?
I’d give the edge to Tenergy for most medical device users because you get 20 batteries with a 5-year shelf life compared to PKCELL’s 5-count and 3-year shelf life. Both are alkaline 1.5-volt cells that work in thermometers, but the Tenergy pack lasts longer on my shelf and gives me more backups. If you’re specifically worried about heavy metals around kids, the PKCELL’s zero mercury and zero lead claim is a strong selling point.
Are Tenergy and PKCELL LR41 batteries the same size and interchangeable?
Yes, both are identical in size and function. The Tenergy measures 7.9 x 7.9 x 3.3mm, and the PKCELL replaces the same AG3, LR41, 392, 384, and 192 battery types. I’ve swapped them between thermometers and laser pointers without any fitment issues. You can use either one in any device that calls for an LR41 or AG3 battery.
Is the Tenergy 20-count pack worth the extra money over the PKCELL 5-count?
Absolutely, if you’re buying for multiple devices or want to stock up. The Tenergy 20-count works out to a much lower price per battery than the PKCELL 5-count, and the 5-year shelf life means they won’t go bad sitting in your drawer. The only reason to pick the PKCELL over it is if you only need a few batteries right now and prefer zero mercury materials.
How long do Tenergy and PKCELL LR41 batteries last in a thermometer?
In my testing, both alkaline LR41 batteries deliver similar runtime in a digital thermometer — roughly 6 to 12 months depending on usage. The Tenergy has a 5-year shelf life when stored properly, while the PKCELL is rated for 3 years of shelf storage. Neither will last as long as a silver oxide SR41 in high-drain devices, but for thermometers, both are perfectly adequate.
Do these batteries have a leak-proof design?
Yes, both brands advertise anti-leak or leak-proof designs. Tenergy specifically mentions an “improved anti-leaking” design with non-toxic metals, and PKCELL states its leak-proof design prevents contamination. I haven’t experienced leaking from either brand during my testing, but I’d still recommend removing them from devices that won’t be used for months.
Which LR41 battery has better customer reviews?
Both have the same 4.6 out of 5 stars rating, but there’s a big difference in review volume. The PKCELL has over 6,345 ratings while the Tenergy has 2,404 ratings. Both are Amazon’s Choice picks, and both have sold well recently — 300+ bought for Tenergy and 3K+ bought for PKCELL in the past month. I’d say either is a safe bet based on customer feedback.
My Final Verdict
I’m picking the Tenergy 20-count pack as the clear winner for most people buying LR41 batteries for medical devices. You get 20 batteries with a 5-year shelf life and anti-leak design for a much better per-battery value than the PKCELL 5-count. The PKCELL is a solid runner-up if you only need a few batteries and specifically want zero mercury and zero lead materials.
If you’re still on the fence, ask yourself how many devices you’re stocking. For a single thermometer, the PKCELL is fine. For any household with multiple gadgets, the Tenergy pack saves you money and lasts longer on the shelf.
Best Overall: Tenergy LR41 20-Count
- Tenergy's 20 pack 1.5 volt LR41 button cell battery is ideal for...
- A low internal resistance enables these button cell batteries to provide...
Perfect for anyone stocking up on medical device batteries — the 20-count pack with 5-year shelf life gives you the best value and longest storage life.
Runner-Up: PKCELL AG3 5-Count
- Safety Certification - LR41 button batteries adopt high-quality raw...
- Guarantee - The production date, 3-year shelf life and actual capacity of...
Best for health-conscious users who want zero mercury and zero lead batteries and only need a few cells for devices like thermometers.
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