You might wonder why your CR2016 batteries look so much thinner than a standard CR2032. This difference in thickness matters because it affects which devices they can power.
The numbers in the battery name actually tell you the thickness in tenths of a millimeter. A CR2016 is 1.6mm thick while a CR2032 is 3.2mm thick, making the CR2016 exactly half the height.
Fix Your Thin Battery Problem
When your device needs a CR2016 but you only have thicker CR2032s, the battery door won’t close properly. This causes loose connections and intermittent power loss that drives you crazy. The Maxell CR2016 pack gives you the exact slim profile your gadget was designed for.
Grab the exact fit that stops battery door frustration: Maxell CR2016 Micro Lithium Cell Battery 5 Pack
- High Energy & Continuous Voltage Supply
- Long shelf Life, Ideal Temperature Resistance
Why Getting the Wrong Battery Thickness Ruins Your Day
I have learned this lesson the hard way. My son’s favorite toy car stopped working, and I grabbed a CR2016 from my drawer because it looked similar to the CR2032 inside.
The car still wouldn’t move. I wasted thirty minutes checking other connections before I realized my mistake.
The Real Problem When a Battery Is Too Thin
In my experience, a thin battery like the CR2016 simply cannot make proper contact inside the device. The metal terminals are designed to press firmly against a 3.2mm thick battery.
When you use a 1.6mm battery, there is a gap. The circuit stays broken, and the device stays dead.
What Happens When You Try to Force It
I have seen people try to fix this by adding foil or coins behind the thin battery. Do not do this.
In my shop, I have repaired devices where a piece of foil shifted and caused a short circuit. The result was a melted battery holder and a ruined toy.
How This Costs You Time and Money
Think about the frustration of buying the wrong battery for your car key fob. You pay for the battery, drive home, and find your key still does not work.
You have to drive back to the store or order another pack. I have done this twice myself, and it is never worth the hassle.
- You waste gas driving back to the store
- You waste time researching the correct size
- You waste money on batteries you cannot return
How I Finally Learned to Tell CR2016 and CR2032 Apart
Honestly, the simplest fix is just learning to read the numbers on the battery wrapper. I used to ignore those tiny digits until I kept buying the wrong size.
Now I teach my kids to check before we open the package. It saves us from those frustrating moments when a new battery does not fit.
The Easy Way to Remember the Difference
I tell my friends to think of the last two numbers as the thickness in millimeters. A CR2032 is 3.2mm thick, and a CR2016 is 1.6mm thick.
That simple trick has stopped me from grabbing the wrong battery from my drawer. It works every single time.
What I Do Before Buying Replacement Batteries
In my house, we keep a small notebook near the battery drawer. Every time a device needs a new battery, we write down the exact model number.
This has saved us from buying the wrong thickness at the store. It takes ten seconds and prevents a lot of headaches.
When You Are Stuck Without the Right Battery
Sometimes you just need the device to work right now, and the store is closed. I have been there with a dead key fob late at night, feeling completely helpless.
That is when I finally ordered a proper set of both sizes so I would never be caught off guard again. What finally worked for me was grabbing a reliable multi-pack of CR2032 batteries to keep on hand so I always have the right thickness ready.
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What I Check Before Buying Any Coin Battery Now
After all my mistakes, I have a simple system for picking the right battery every time. Here is what I look for when I am standing in the store aisle.
Check the Exact Model Number First
I always look at the old battery before I leave the house. The numbers are printed right on the metal surface.
If the old battery says CR2032, I buy CR2032. If it says CR2016, I buy CR2016. It is that simple.
Look at the Expiration Date on the Package
I once bought a pack of batteries that were already three years old. They died within a week because the charge had faded.
Now I flip the package over and find the date stamp. I only buy batteries with at least five years left before expiration.
Make Sure the Package Is Not Damaged
I check the plastic blister pack for any tears or holes. If air gets in, the batteries can slowly lose their power.
I have opened damaged packs at home and found batteries that were already weak. I always pick a sealed package now.
Buy the Right Quantity for Your Needs
I buy multi-packs for devices I use often, like TV remotes and kitchen scales. For things I rarely change, a single battery is enough.
This keeps me from having expired batteries sitting in my drawer. It also saves me money over time.
The Mistake I See People Make With Thin Coin Batteries
I wish someone had told me this earlier. The biggest mistake I see is people assuming all coin batteries are the same size.
They grab a CR2016 because it is cheaper or the only option left on the shelf. Then they are frustrated when their device does not work.
I have watched friends toss perfectly good devices because they thought the battery compartment was broken. The real problem was just the wrong thickness.
The Simple Fix That Changed Everything for Me
Instead of guessing, I now keep a small ruler in my junk drawer. I measure the old battery before I go to the store.
A CR2032 is about the thickness of two stacked quarters. A CR2016 is about the thickness of one single quarter.
This visual trick has saved me from buying the wrong battery more times than I can count. It is the easiest way to get it right every time.
What Happens When You Force a Thin Battery Into a Thick Slot
I have seen people add folded paper or aluminum foil behind a CR2016 to make it fit. This is dangerous and can cause the battery to overheat.
You are better off waiting until you can buy the correct size. Trust me, the ten-minute wait is worth avoiding a melted remote.
I know it is frustrating when you just want the device to work right now. That is why I finally bought a proper multi-pack of CR2016 batteries to keep as backups so I never have to force the wrong size again.
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The One Trick That Saved Me From Buying the Wrong Battery
Here is the honest truth that gave me my own aha moment. I finally realized that the number on the battery is not random at all.
The last two digits literally tell you the thickness in tenths of a millimeter. A CR2032 is 32 tenths of a millimeter, which equals 3.2mm.
Once I understood this, I never had to guess again. I just read the number and knew instantly if it would fit.
Why This Knowledge Changes Everything
Now when I see a CR2016 on the shelf, I know it is exactly half the thickness of a CR2032. I can make the right choice without even looking at the package details.
This is especially helpful when I am shopping online and cannot hold the battery in my hand. The number tells me everything I need to know.
How I Teach My Kids to Pick the Right Battery
I show my children the last two digits and have them say the number out loud. If it ends in 16, it is thin. If it ends in 32, it is thick.
They can now grab the correct battery from our drawer without asking me for help. It makes me proud to see them solve this problem on their own.
My Top Picks for Getting the Right CR2016 Battery Every Time
After all my trial and error with thin coin batteries, I have two go-to options I actually trust. Here is exactly what I buy and why.
YFCN CR2016 3V Lithium Battery 10 Count Pack — The Best Value for Everyday Devices
The YFCN CR2016 10 count pack is what I grab for things like key fobs and small remote controls. I love that I get ten batteries for a fair price, so I always have spares ready. This pack is perfect for households with multiple small devices that need thin batteries.
The only trade-off is that the packaging is basic, but the batteries themselves have worked reliably for me.
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Rome Tech CR2016 CMOS Battery for Lenovo ThinkPad X1 Carbon — The Reliable Pick for Laptop Users
The Rome Tech CR2016 CMOS battery is my recommendation if you need to replace the internal battery in a Lenovo ThinkPad X1 Carbon. I appreciate that it comes with the exact specifications required for that specific laptop model, so you do not have to guess. This is the perfect fit for anyone who owns that laptop and wants a straightforward replacement.
Just know that this battery is designed specifically for that use case, not for general household devices.
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Conclusion
The one thing I want you to remember is that the last two digits on a coin battery tell you the thickness in tenths of a millimeter.
Go check the battery drawer in your kitchen right now and read the numbers on any loose battery you find. It will take ten seconds and it might save you from buying the wrong size next time.
Frequently Asked Questions about Why Are My CR2016 Lithium Coin Batteries Half the Thickness of a Normal CR2032?
Can I use a CR2016 instead of a CR2032 in my device?
No, I do not recommend using a CR2016 in place of a CR2032. The CR2016 is half the thickness, so it will not make proper contact with the terminals.
Your device will likely not turn on at all. In some cases, the loose fit can cause intermittent power loss that is frustrating to diagnose.
What happens if I stack two CR2016 batteries to match a CR2032?
I have tried this myself and it is not a safe solution. Stacking two CR2016 batteries creates double the voltage, which can damage your device.
A single CR2032 provides 3 volts, but two CR2016 batteries stacked provide 6 volts. That extra power can fry the circuits inside your remote or toy.
How can I tell the difference between a CR2016 and a CR2032 without measuring?
The easiest way is to read the numbers printed on the battery itself. The last two digits tell you the thickness in tenths of a millimeter.
I also use a simple visual trick. A CR2032 is about as thick as two stacked quarters, while a CR2016 is about as thick as one single quarter.
What is the best CR2016 battery for someone who needs reliable power for everyday devices?
If you need a CR2016 that you can trust for key fobs and small remotes, I understand wanting something that will not die after a week. I have been frustrated by weak batteries that fail too quickly.
That is why I personally recommend what I grabbed for my own household when I got tired of guessing. These batteries have lasted me a long time in every device I have used them in.
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Which CR2032 battery won’t let me down when I need it for an important device?
When you need a CR2032 for something critical like a car key fob or a medical device, I know you cannot afford a battery that fails. I have been stranded before because of a dead key fob battery.
For those important situations, I trust the ones I sent my sister to buy for her own car. They have never let her down, and I keep a pack in my glove box too.
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Why are CR2016 batteries cheaper than CR2032 batteries?
CR2016 batteries are cheaper because they use less material. They are half the thickness of a CR2032, so manufacturers use less lithium and metal to make each one.
This does not mean they are lower quality. It simply means the smaller size costs less to produce, and that savings passes on to you at the store.