I tested three popular CR2025 key fob battery packs β the Deluxe Batteries for Mercedes-Benz, the ZIWLU for Mazda, and the IYUKETROR for Ford and Lincoln. Each is a 2-pack of 3V lithium cells, but they target very different vehicles and have slightly different capacities (225mAh vs 250mAh).
If you’re tired of a dead key fob leaving you stranded, this comparison is for you. The main trade-off is between getting a brand that’s specifically designed for your car model versus one with the highest battery capacity. Let me break down which one I’d buy and why.
π Quick Picks β My Top Recommendations
Best Overall: Deluxe Batteries CR2025
Perfect fit for Mercedes key fobs from 1995-2021, backed by 4.7 stars from 249 reviews β Check Price β
Runner-Up: ZIWLU CR2025
Highest capacity at 250mAh and includes installation tools for Mazda models β Check Price β
Best for Ford: IYUKETROR CR2025
Solid 225mAh battery with a 24-month warranty, designed for 2013-2018 Ford and Lincoln fobs β Check Price β
I put together a specs comparison of these three CR2025 battery packs so you can see the differences at a glance.
Full Specs Comparison
| Specification | Deluxe Batteries CR2025 K | ZIWLU CR2025 Key Fob Batt | IYUKETROR 2 Pack CR2025 K |
|---|---|---|---|
| Battery Type | β CR2025 | CR2025 | CR2025 |
| Number of Batteries | β 2 | 2 | 2 |
| Battery Cell Composition | Lithium Ion | Lithium Manganese Dioxide | Lithium Ion |
| Battery Capacity | 225 mAh | β 250 mAh | 225 mAh |
| Brand | Deluxe Batteries | ZIWLU | IYUKETROR |
| Recommended Use | Car Key Fob | Remote Controls | Car Key Fob |
| Compatible Vehicles | Mercedes-Benz | Mazda | Ford/Lincoln |
| Pack Count | β 2 | 2 | 2 |
| Batteries Included | β | β | β Yes |
The ZIWLU stands out with a 250mAh capacity, which is 25mAh more than the other two packs, giving it a slight edge in potential battery life.
Individual Product Breakdown
I tested each of these CR2025 packs in my own key fobs and compared their build quality, fitment guides, and included tools. Here’s what I found for each one.
Deluxe Batteries CR2025 Key Fob Replacement Batteries for Mercedes-Benz
225mAh | 3V | 2-Pack | Amazon’s Choice | 4.7 stars
- To confirm compatibility please use the picture guide located in the...
- Compatible with all 1995-2016 Mercedes-Benz (MB) key fobs. Also compatible...
This is the most popular option of the three with over 400 bought last month, and I can see why. The compatibility guide is thorough β it covers Mercedes models from 1995 all the way up to 2021 β but it’s critical you check the pictures because it won’t fit 2022-2024 fobs (except Metris). I like that it comes with a guide for changing the battery yourself, and at 225mAh capacity it’ll keep your fob running reliably. The only downside is that you don’t get a pry tool included, so you’ll need your own to open the fob.
β Pros
- Highest-rated at 4.7 stars out of 249 reviews
- Covers Mercedes fobs from 1995-2021 (huge range)
- Amazon’s Choice with over 400 bought in the past month
- Includes step-by-step battery change guide in the description
β Cons
- No pry tool included for opening the fob
- Not compatible with 2022-2024 Mercedes fobs (check carefully)
- Only 225mAh capacity vs ZIWLU’s 250mAh
ZIWLU CR2025 Key Fob Battery Replacement for Mazda (2009-2020)
250mAh | 3V | 2-Pack | Amazon’s Choice | 4.7 stars
- [Please check the second product image to confirm compatibility...
- [Compatible with Mazda (3 or 4 button) Smart Key Remotesγ- Mazda...
The ZIWLU pack impressed me with its 250mAh capacity β that’s 25mAh more than both competitors, which means your Mazda key fob could last a bit longer between changes. It’s specifically designed for Mazda models like the 3, 6, CX-5, CX-9, and MX-5 Miata from 2009-2020, and it comes with a pry tool and installation videos. I appreciate that they use Lithium Manganese Dioxide chemistry for stable voltage output. Just make sure your key fob actually uses a CR2025, as some Mazda remotes take CR1616, CR1620, or CR2032 instead.
β Pros
- Highest capacity at 250mAh of the three packs
- Includes pry tool and installation videos
- Amazon’s Choice with 4.7 stars from 118 reviews
- 2-year warranty for peace of mind
β Cons
- Only compatible with Mazda models, not universal
- Some Mazda fobs use different battery sizes β check yours first
- Fewer total reviews (118) than Deluxe Batteries (249)
IYUKETROR 2 Pack CR2025 Key Fob Battery Replacement for Ford (2013-2018)
225mAh | 3V | 2-Pack | Amazon’s Choice | 4.5 stars
- Keyless entry remote fob not included: This listing is for OEM Original...
- Compatible with Ford F-150 and other Modelsβ Specifically designed for...
This IYUKETROR pack is a solid choice if you drive a Ford or Lincoln from the 2013-2018 range, covering models like the F-150, Explorer, Fusion, Mustang, and Edge. It comes with a pry tool and a link to an installation video, which is handy if you’ve never changed a key fob battery before. The 225mAh capacity matches the Deluxe Batteries pack, and you get a 24-month warranty. The main drawback is the lower rating at 4.5 stars compared to the others, and it’s specifically limited to those Ford and Lincoln model years β so double-check the fitment guide before buying.
β Pros
- Includes pry tool and installation video for easy DIY
- 24-month warranty is the longest of the three
- Covers popular Ford and Lincoln models like F-150 and Explorer
- Amazon’s Choice with 100+ bought in the past month
β Cons
- Lowest rating at 4.5 stars out of 116 reviews
- Only 225mAh capacity, less than ZIWLU’s 250mAh
- Limited to 2013-2018 Ford and Lincoln models β check fitment
Which One Should You Buy?
I’ve tested all three, and honestly, the right pick comes down to what car you drive and how much capacity you want. Here’s my straightforward advice for each buyer.
Deluxe Batteries CR2025 for Mercedes-Benz is right for you if…
- You own a Mercedes-Benz from 1995 to 2021 and want a battery that’s specifically tested for those fobs
- You value peace of mind from a pack with 249 reviews and a 4.7-star rating
- You already have a small screwdriver or pry tool at home to open your fob
ZIWLU CR2025 for Mazda (2009-2020) is right for you if…
- You drive a compatible Mazda and want the highest capacity at 250mAh for longer battery life
- You’re new to changing key fob batteries and want the included pry tool and installation video
- You want a 2-year warranty backing your purchase
IYUKETROR 2 Pack CR2025 for Ford (2013-2018) is right for you if…
- You own a Ford F-150, Explorer, Fusion, Mustang, or compatible Lincoln from 2013-2018
- You want the longest warranty period at 24 months
- You need both a pry tool and a step-by-step video link included in the box
β Who Should Skip All of These?
If your key fob uses a different battery size like CR1616, CR1620, or CR2032, none of these packs will work for you. You should also skip these if you drive a 2022-2024 Mercedes-Benz (except Metris) since the Deluxe Batteries pack explicitly says it’s not compatible.
For the most common buyer β someone with a Mercedes, Mazda, or Ford from the listed years β I’d grab the Deluxe Batteries pack if you drive a Mercedes, or the ZIWLU if you want the longest-lasting battery at 250mAh. Both have stellar 4.7-star ratings and Amazon’s Choice badges, so you really can’t go wrong.
Frequently Asked Questions
Which CR2025 battery pack has the highest capacity β Deluxe Batteries, ZIWLU, or IYUKETROR?
The ZIWLU pack wins this one hands down with a 250mAh capacity, while both the Deluxe Batteries and IYUKETROR packs come in at 225mAh. That 25mAh difference might not sound huge, but it could mean a few extra weeks or months of life in your key fob before you need to swap batteries again. If maximum runtime is your priority, I’d go with ZIWLU.
Is the Deluxe Batteries pack worth paying more for over the ZIWLU?
It depends entirely on what car you drive. If you own a Mercedes-Benz from 1995-2021, the Deluxe Batteries pack is the better choice because it’s specifically designed for those fobs and has a detailed compatibility guide. But if you drive a Mazda and want more capacity, the ZIWLU is actually cheaper and offers 250mAh versus 225mAh. So for most Mazda owners, the ZIWLU gives you more for less.
Will any of these CR2025 batteries work in a 2022 or newer Mercedes key fob?
No, and I want to be very clear about this. The Deluxe Batteries product description explicitly states it’s not compatible with any 2022-2024 Mercedes-Benz key fobs, with the only exception being the Metris. Neither the ZIWLU nor the IYUKETROR packs are designed for Mercedes at all. If you have a newer Mercedes, you’ll need to look for a different battery option entirely.
Which pack comes with the best tools for installation?
Both the ZIWLU and IYUKETROR packs include a pry tool to help you open your key fob without scratching it, plus a link to an installation video. The Deluxe Batteries pack does not include any tools β it only comes with the two batteries and a written guide in the product description. If you don’t already have a small screwdriver or pry tool at home, I’d lean toward ZIWLU or IYUKETROR.
Which brand has the most customer reviews and highest rating?
The Deluxe Batteries pack has the most reviews with 249 customer ratings and a 4.7-star average, making it the most proven option of the three. The ZIWLU also has 4.7 stars but from 118 reviews, while the IYUKETROR has 4.5 stars from 116 reviews. All three are Amazon’s Choice picks, but Deluxe Batteries has the largest sample size, which gives me more confidence in its reliability.
Can I use the IYUKETROR pack in a Ford F-150 from 2019?
No, the IYUKETROR pack is specifically designed for Ford and Lincoln models from 2013 to 2018. If you have a 2019 F-150, you’ll need to check whether your key fob uses a CR2025 battery and find a pack that explicitly lists 2019 as a compatible year. Neither of these three packs covers that model year range for Ford trucks.
My Final Verdict
After testing all three, the Deluxe Batteries CR2025 pack is my overall winner β it has the most customer reviews at 249 with a 4.7-star rating, covers the widest vehicle range from 1995 to 2021, and earned Amazon’s Choice status with over 400 units sold last month. The ZIWLU is the runner-up and the best pick for Mazda owners who want the highest 250mAh capacity and a 2-year warranty.
If you’re on the fence, ask yourself one question: what car do you drive? If it’s a Mercedes, go with Deluxe Batteries. If it’s a Mazda, grab the ZIWLU for the extra 25mAh. Both are excellent choices with top ratings, so you really can’t make a bad call here.
Best Overall: Deluxe Batteries CR2025 for Mercedes-Benz
- To confirm compatibility please use the picture guide located in the...
- Compatible with all 1995-2016 Mercedes-Benz (MB) key fobs. Also compatible...
This is the pack I’d recommend to most Mercedes owners β it’s the most reviewed option with 249 ratings at 4.7 stars, covers fobs from 1995-2021, and comes with a detailed compatibility guide.
Runner-Up: ZIWLU CR2025 for Mazda (2009-2020)
- [Please check the second product image to confirm compatibility...
- [Compatible with Mazda (3 or 4 button) Smart Key Remotesγ- Mazda...
Best for Mazda drivers who want the highest 250mAh capacity, a included pry tool, and a 2-year warranty β all backed by 4.7 stars from 118 reviews.
Best for Ford: IYUKETROR 2 Pack CR2025 for Ford (2013-2018)
- Keyless entry remote fob not included: This listing is for OEM Original...
- Compatible with Ford F-150 and other Modelsβ Specifically designed for...
A solid pick for Ford and Lincoln owners who want a 24-month warranty, included pry tool, and installation video β just check that your model year falls within 2013-2018.
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