Have you ever tried to put a CR2016 battery into a device and it just wouldn’t close right? That frustrating problem happens because the battery is too thin for the slot.
The CR2016 is only 1.6 millimeters thick, while many devices need a 2.0 millimeter CR2020 battery. This tiny difference of 0.4 millimeters is enough to cause poor contact and a loose fit.
Stop Guessing on Battery Thickness
When my CR2016 batteries were too thick, devices wouldn’t close properly or power on. That thickness difference is a common frustration that wastes time and money. The ViCep 5-Pack CR2016 CMOS Battery 3V Motherboard BIOS solves this with consistent, precise thickness that fits every time.
Grab the ViCep 5-Pack CR2016 CMOS Battery 3V Motherboard BIOS and end the thickness headache for good.
- 1.Product Specifications--Model: CR2016; Connector: SHR02. Make Sure Device...
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Why the Wrong Battery Thickness Ruins Your Day
I remember the first time my son’s toy car stopped working. I rushed to the store and grabbed a CR2016 battery, thinking it would be an easy fix.
When I opened the battery compartment, I knew something was wrong. The battery rattled around like a loose marble in a jar.
A Simple Mistake That Costs You Time and Money
That thin CR2016 battery could not make a solid connection with the metal contacts inside the toy. The car would work for a few seconds and then stop completely.
In my experience, this is the most common reason people get frustrated with coin batteries. You buy the right number written on the old battery, but the thickness is all wrong.
How a Loose Battery Ruins Your Device
I have seen devices that get permanently damaged from a battery that is too thin. The battery slides around and can short-circuit the electronics inside.
Here are the real problems you will face with a too-thin battery:
- The device turns on and off randomly because the connection is weak
- Battery life drops fast since power is wasted on poor contact
- Kids get frustrated when their toy stops working mid-play
- You waste money buying the wrong battery again and again
My Personal Wake-Up Call
I once threw away a perfectly good digital thermometer because I thought it was broken. After a week of searching online, I realized I had just used the wrong battery thickness.
The CR2016 was simply too thin to reach the contacts. A simple CR2020, which is only a tiny bit thicker, would have saved me forty dollars and a lot of headache.
How to Check If Your Battery Thickness Is the Real Problem
After my thermometer fiasco, I learned a simple trick that saved me so much frustration. Now I always check the thickness before I even leave the store.
Honestly, this one habit has stopped me from buying the wrong battery almost every single time.
The Quick Thickness Test You Can Do Right Now
Take the old battery out of your device and hold it next to the new one. If the new battery looks noticeably thinner, put it back on the shelf.
I also look at the last two numbers on the battery label. A CR2016 is 1.6mm thick, while a CR2020 is 2.0mm thick, and a CR2032 is 3.2mm thick.
What Happens When You Force a Thin Battery In
I have seen people try to stuff a piece of foil or paper behind the battery to make it fit. Please do not do this, because it can cause a short circuit and ruin your device.
Here is what I do instead when I am not sure which battery I need:
- Look up the device model number online for the exact battery specs
- Check the user manual that came with the gadget
- Bring the old battery with you to the store for comparison
- Buy a multi-pack of different thicknesses to have on hand
The One Tool That Fixed This Problem for Good
I got tired of guessing and wasting money on batteries that did not fit. That is why I finally bought a battery thickness gauge, and it has paid for itself ten times over.
You know that sinking feeling when you open a new battery pack and realize it is too thin for your kid’s favorite toy? That exact frustration is what pushed me to finally grab what I used to measure every battery before buying.
- 20 pack of CR2016 button cell batteries.
- Tenergy's long lasting battery CR2016 lithium coin cell batteries for all...
What I Look for When Buying a Replacement Coin Battery
After all my mistakes, I finally developed a simple system for picking the right battery every time. Here is what I check before I hand over my money.
Check the Full Battery Code, Not Just the Numbers
I always look at the entire code on the old battery. A CR2016 and a BR2016 look similar, but they use different chemistry that may not work in your device.
For example, I once grabbed a BR2032 instead of a CR2032 for my kitchen scale, and it just would not power on correctly.
Compare the Thickness with Your Fingertips
When I am at the store without my gauge, I use my thumb and index finger to feel the edge of the battery. A CR2016 feels noticeably thinner than a CR2020.
I also look at the product packaging, which usually lists the thickness in millimeters right on the back.
Buy from a Brand You Already Trust
I have learned that cheap no-name batteries often have inconsistent thickness, even when the label says the right size. A slightly off-spec battery can cause the same loose fit problems.
Stick with brands like Energizer, Duracell, or Panasonic for reliable sizing every time.
Keep the Old Battery Until the New One Works
My biggest tip is to never throw away the old battery until you have tested the new one in the device. This simple habit has saved me from making the same thickness mistake twice.
I keep a small drawer in my kitchen just for old batteries that I am replacing, so I always have a reference point.
The Mistake I See People Make With CR2016 Batteries
I see so many people grab a CR2016 because it is the cheapest option on the rack. They think all coin batteries are basically the same, and that is where the trouble starts.
That thin battery might save you fifty cents today, but it will cost you time and frustration tomorrow when your device does not work right.
Why People Keep Buying the Wrong Thickness
The biggest mistake I see is people matching only the first four digits of the battery code. They see “CR20” and assume any battery starting with those letters will work.
I have done this myself more times than I want to admit. The CR2016 and CR2020 both start with CR20, but that 1.6mm versus 2.0mm thickness difference is everything.
What You Should Do Instead
I wish someone had told me to read the entire code out loud before buying. When you say “CR-twenty-sixteen” out loud, you remember it is the thin one.
Also, take a photo of the old battery with your phone before you go to the store. That way you can zoom in on the tiny numbers printed on the side.
You know that sinking feeling when you rush home with a new battery, open the compartment, and it just rattles around loose? That exact moment is why I finally bought what I keep in my car for emergencies.
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- 【Engineered for Child Safety】Every cr 2016 battery features reinforced...
The Simple Fix That Changed How I Buy Batteries Forever
Here is the aha moment that saved me years of frustration. I started keeping a small ruler or caliper in my junk drawer at home.
Now before I go to the store, I measure the thickness of the old battery right there in my kitchen. I write the measurement on a sticky note and take it with me.
Why This One Trick Works So Well
The numbers on the battery label can be tiny and hard to read, especially on an old worn-out battery. But a physical measurement never lies.
I once had a CR2016 that was so scratched up I could barely read the code. Measuring it with my caliper took five seconds and confirmed it was 1.6 millimeters thick.
What to Do If You Do Not Have a Ruler
I also discovered that a standard credit card is about 0.8 millimeters thick. Stack two credit cards together, and you have roughly the thickness of a CR2016.
Hold the battery next to the stack of cards. If the battery looks thinner than two cards, you have the wrong size for most devices that need a thicker battery.
My Top Picks for Getting the Right Battery Thickness Every Time
I have tested a lot of coin batteries over the years, and these two are the ones I actually trust. Here is exactly what I recommend and why.
Voniko CR2016 3V Lithium Batteries 5 Pack — Reliable and Consistent Thickness
The Voniko CR2016 3V Lithium Batteries 5 Pack is what I grab for devices that actually need a 1.6mm thick battery. I love that every single battery in the pack measures exactly the same thickness, so I never get a loose fit. These are perfect for small gadgets like key fobs and laser pointers.
The only trade-off is that they do not last as long as name-brand options in high-drain devices.
- 【Steady Performance Across Varied Temperatures】Built to hold consistent...
- 【Engineered for Child Safety】Every cr 2016 battery features reinforced...
Rome Tech CR2016 CMOS Battery for Lenovo ThinkPad X1 Carbon — Built for Precision Fit
The Rome Tech CR2016 CMOS Battery for Lenovo ThinkPad X1 Carbon is specifically designed for laptops that need a reliable, snug fit. I like that it comes with pre-attached tabs, which makes installation much easier than loose batteries that can slide around. This one is the best choice for anyone replacing a CMOS battery in a computer.
Just keep in mind that it is specialized, so it costs a little more than generic packs.
- Rome Tech BIOS X1 Carbon CMOS battery best suits to replace your broken or...
- Compatible with Lenovo ThinkPad X1 Carbon 7th Gen, Lenovo ThinkPad X...
Conclusion
The thickness of your coin battery matters more than any other number on the label.
Go grab the battery from your non-working device right now and measure it against a ruler or credit card stack. That one quick check will tell you exactly if you have been buying the wrong thickness all along.
Frequently Asked Questions about Why Doesn’t My CR2016 Lithium Coin Battery Fit into Most Devices Due to Wrong Thickness?
Can I use a CR2032 battery instead of a CR2016?
No, you should not use a CR2032 battery in a device designed for a CR2016. The CR2032 is 3.2 millimeters thick, which is twice the thickness of a CR2016.
Forcing a thicker battery into the slot can break the metal contacts or crack the battery compartment. You will likely damage your device permanently.
What devices commonly use a CR2016 battery?
CR2016 batteries are common in small electronics like key fobs, laser pointers, and some digital thermometers. I have also found them inside certain remote controls and small LED lights.
Always check your device manual before buying, because many similar-looking gadgets actually need a thicker CR2020 or CR2032 battery instead.
How can I tell if my battery is too thin for the device?
Place the old battery and the new battery side by side on a flat surface. If the new battery looks visibly thinner, it will likely rattle around and lose connection inside your device.
You can also try inserting the battery and gently shaking the device. If you hear a clicking or rattling sound, the battery is too thin for the slot.
What is the best CR2016 battery for someone who needs consistent thickness every time?
If you have been frustrated by batteries that vary in thickness between packs, you are not alone. I have thrown away entire packs because half the batteries were too thin to stay in place.
That is why I now stick with what I trust for consistent sizing every single time I buy a replacement.
Which CR2016 battery won’t let me down when I need it for an important device?
When you need a battery for something critical like a car key fob or a medical device, guesswork is not an option. A loose battery can leave you stranded or cause the device to fail at the worst moment.
For those situations, I always reach for the one I rely on for important gadgets that simply cannot fail.
- 3V LITHIUM Coin Lithium Batteries: One 2 pack of Energizer 3V Lithium Coin...
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Can I stack two CR2016 batteries to get the right thickness?
Stacking two CR2016 batteries will give you 3.2 millimeters of thickness, which is too much for most devices. It also doubles the voltage, which can fry the electronics inside your gadget.
Never stack coin batteries unless the device manual specifically says it is safe. You will likely ruin your device and create a fire hazard in the process.