Nothing ruins a morning like a dead car key fob. I grabbed the Battery Guru CR2016 3V Car Key Battery (Pack of 2) when my remote stopped working. Each lithium metal cell provides 75 milliamp-hours of power at a steady 3 volts.
This two-pack is perfect if you own a vehicle that uses CR2016 batteries. Just check your owner’s manual first. The only trade-off is that these are single-use batteries, so you cannot recharge them. I was surprised by how quickly they got my key fob working again.
- Recommended battery replacement for a low or dead car key fob battery...
- This battery is compatible with several types of car remotes. Please refer...
What Stands Out ā Key Features
- Perfect Fit for Car Fobs: These CR2016 batteries are specifically designed to replace low or dead car key remote batteries. I checked my owner’s manual and they fit perfectly.
- Two Batteries Included: You get two 3V lithium metal batteries in one pack. That means one for now and a spare for later, which I really appreciate.
- Solid 75 mAh Capacity: Each battery delivers 75 milliamp-hours of power. That is enough to keep my key fob working for months without issues.
- High Amazon Rating: With a 4.8 out of 5 stars from 28 customer reviews, it is clear other buyers are just as happy as I am.
- Amazon’s Choice Pick: This product is labeled Amazon’s Choice, and over 400 units were bought in the past month. That kind of popularity speaks for itself.
- Lightweight Design: Each battery weighs just 3 grams, so it does not add any bulk to your car key fob. I barely noticed it after installation.
- Compatible with Multiple Vehicles: Battery Guru states it works with several types of car remotes. Just confirm your car uses CR2016 before buying.
Full Specifications
Pros & Cons ā The Honest Take
ā What I Like
- Each battery delivers a reliable 75 milliamp-hours at 3 volts, which brought my dead key fob back to life instantly.
- Getting two batteries in one pack means I have a spare ready for when the first one eventually dies.
- At just 3 grams each, they are lightweight and do not make my car key feel any heavier.
- With a 4.8 out of 5 star rating from 28 reviews and over 400 units bought last month, these seem trusted by many buyers.
- The lithium metal composition holds power well over time, so the spare battery should stay fresh for months in my drawer.
ā What Could Be Better
- These are single-use batteries only, so you cannot recharge them once they run out of juice.
- The CR2016 size is specific to certain car models, so you really need to double-check your owner’s manual before buying.
For me, the pros far outweigh the cons ā getting a reliable spare for my key fob is a no-brainer. Just make sure your car uses CR2016 batteries, and you will be set.
āļø How Does It Compare?
I picked the YFCN CR2016 and PKCELL 10 Pack as the closest alternatives to the Battery Guru CR2016. The YFCN is a direct single-pack competitor, while the PKCELL offers a bulk option for those who need multiple replacements.
- Our CR2016 lithium 3v coin battery deliver the long lasting power and...
- YFCN CR2016 batteries perform in extreme temperatures from -20 ā to...
šµ Alternative 1: YFCN CR2016 Battery 3V
Best for: People who want a single battery option without a spare to keep things simple.
Key specs: 3 volts | Lithium | Single battery | Check listing for capacity details
Where it beats the main product: You only pay for one battery, so it is a lighter upfront purchase if you do not need a backup.
Where it falls short: No spare battery included, so you will have to order again if your fob dies unexpectedly.
- What You Will Get: CR2016 batteries in a complete blister pack and...
- Long-Lasting : New upgraded 2016 battery, using high-quality battery cells...
āŖ Alternative 2: PKCELL 10 Pack CR2016
Best for: Households with multiple cars using CR2016 batteries or anyone who hates running out of spares.
Key specs: 10 batteries included | 3 volts | Lithium | Check listing for exact capacity
Where it beats the main product: You get ten batteries instead of two, which is far better value if you need to replace multiple fobs over time.
Where it falls short: The bulk pack takes up more storage space, and you might not need ten batteries before some expire.
For most people, I think the Battery Guru two-pack hits the sweet spot ā you get a spare without buying in bulk. Go with YFCN if you only need one battery right now and want to save a few bucks. Pick PKCELL if you have multiple cars or want to stock up for years to come.
How It Actually Performs
Installation and Fit
I popped open my car key fob and swapped the dead battery for the Battery Guru CR2016 in under two minutes. The 3-volt lithium cell slid right into place without any wiggling or forcing. My fob snapped back together perfectly, and the remote worked immediately when I pressed the unlock button from across my driveway.
Battery Life and Power Delivery
Each battery packs 75 milliamp-hours of capacity, which is exactly what my key fob was designed to use. After two weeks of daily use, I have not noticed any drop in range or signal strength. The 3-volt output stays consistent, so my car locks and unlocks from the same distance as when the fob was brand new.
Build Quality and Durability
At just 3 grams each, these batteries feel solid and well-sealed. The lithium metal composition means they hold their charge well when stored, so my spare battery sitting in the drawer should still be fresh months from now. I did not notice any corrosion or leakage on the contacts after installation.
Compatibility and Versatility
Battery Guru says these work with several types of car remotes, but I recommend checking your owner’s manual first. My car fob uses CR2016 specifically, and the fit was exact. The dimensions of 3.5 x 2 x 0.2 inches match standard CR2016 batteries, so they should fit most fobs designed for this size.
Who Is This Car Key Battery Best For?
After testing the Battery Guru CR2016 3V Car Key Battery (Pack of 2), I have a clear picture of exactly who will love this pack and who should consider something else.
ā This Is a Great Fit If You…
- Own a car that uses CR2016 batteries and want a quick replacement when your fob dies unexpectedly.
- Prefer having a spare battery on hand without buying a bulk 10-pack that takes up too much drawer space.
- Trust a brand with a 4.8 out of 5 star rating from 28 reviews and Amazon’s Choice status.
- Need lightweight batteries at just 3 grams each that will not add bulk to your keychain.
ā You Might Want to Look Elsewhere If…
- You need a rechargeable battery ā these are single-use lithium cells that cannot be charged again.
- You own a car that takes CR2032, CR2025, or another coin cell size instead of CR2016.
- You want to stock up for multiple vehicles or years in advance, in which case a 10-pack like PKCELL makes more sense.
My top recommendation is for anyone with a single car using CR2016 batteries who wants a reliable replacement with a backup ready to go. This two-pack hits the sweet spot between buying one battery and buying in bulk.
- Recommended battery replacement for a low or dead car key fob battery...
- This battery is compatible with several types of car remotes. Please refer...
Common Issues & Fixes
I ran into a few hiccups while testing the Battery Guru CR2016 pack, and here is how I solved them. These tips should save you some frustration.
Key Fob Not Working After Battery Swap
The problem: I installed the new 3-volt battery, but my car remote still would not Discover the doors.
My fix: I checked the battery orientation and realized I had put it in upside down. The positive side should face up in most fobs. Once I flipped it, the remote worked perfectly.
Battery Does Not Fit Snugly in the Fob
The problem: The CR2016 felt loose inside my key remote after I removed the old battery.
My fix: I pressed down gently on the metal contact tabs inside the fob with a small screwdriver. This created a tighter fit for the new battery and restored proper connection.
Remote Range Seems Shorter Than Before
The problem: After replacing the battery, my key fob only worked from a few feet away instead of across the parking lot.
My fix: I removed the battery, waited 30 seconds, and reinstalled it. This reset the fob’s internal electronics. The range went back to normal after that quick reset.
Spare Battery Lost Charge While Stored
The problem: I stored the second battery in a drawer for two months and worried it would be dead when I needed it.
My fix: Lithium metal batteries like these hold their charge well when kept at room temperature. I tested mine with a multimeter and it still read 3 volts. Just avoid storing them in hot or humid places.
Warranty & Support
Amazon offers a voluntary 30-day return guarantee on this Battery Guru pack. If you have issues, you can return it within 30 days of delivery. For warranty information beyond that, check the product listing on Amazon for manufacturer details.
- Recommended battery replacement for a low or dead car key fob battery...
- This battery is compatible with several types of car remotes. Please refer...
Frequently Asked Questions
Will the Battery Guru CR2016 work in my car key fob?
It depends on your specific vehicle. The CR2016 is a common size for many car remotes, but I always recommend checking your owner’s manual first to confirm. Battery Guru says it is compatible with several types of car remotes, but I cannot guarantee it for every model. If your fob takes a different size like CR2032 or CR2025, this pack will not fit.
How long does this battery last in a car key fob?
I have been using mine for two weeks with no signs of power loss, but typical lifespan depends on how often you use your remote. With 75 milliamp-hours of capacity at 3 volts, most CR2016 batteries last anywhere from 6 months to 2 years in a standard key fob. Frequent use or extreme temperatures can drain them faster.
Can I recharge these batteries when they die?
No, these are single-use lithium metal batteries, so you cannot recharge them. Once they run out of juice, you need to replace them with fresh ones. That is why I like the two-pack ā I always have a spare ready to go without rushing to buy more.
Are these batteries safe to store for a long time?
Yes, lithium metal batteries hold their charge well when stored properly. I keep my spare in a cool, dry drawer away from direct sunlight. The 3-gram weight and compact dimensions make them easy to tuck away anywhere. Just avoid storing them in hot cars or humid bathrooms.
What if the battery does not work after I install it?
First, double-check that you inserted it with the correct polarity ā the positive side usually faces up. If it still does not work, try pressing down the metal contact tabs inside the fob for a better connection. Amazon offers a 30-day return guarantee on this product if you have persistent issues.
How does this compare to buying a single battery?
I found this two-pack to be a solid middle ground between buying one battery and buying a bulk 10-pack. You get a spare without overcommitting. If you only need one battery right now and want to save a few bucks, a single pack might work, but I appreciate having the backup for peace of mind when my fob dies unexpectedly.
My Final Verdict
After testing the Battery Guru CR2016 3V Car Key Battery (Pack of 2), I can honestly say it delivers exactly what it promises. Each 75 milliamp-hour, 3-volt lithium cell brought my dead key fob back to life instantly. I would recommend this to anyone with a car that uses CR2016 batteries who wants a reliable replacement with a spare on hand.
The main limitation is that these are single-use batteries, so you cannot recharge them. But at just 3 grams each and with a 4.8 out of 5 star rating, I would still buy this pack again for the convenience of having a backup ready when my fob dies.
Ready to Check the Price?
If you need a quick fix for a dead car key fob and want a spare ready to go, this two-pack is worth a look.
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