Have you ever struggled to open a new CR2016 battery and wondered why it is so tightly sealed? That double seal is not there to frustrate you; it keeps the battery fresh and safe until you are ready to use it.
The inner seal protects the lithium chemistry from moisture, while the outer layer is a tough plastic shell for shipping safety. Knowing how to separate these layers properly prevents damage to the battery and your device.
Stop Wasting Time on Weak Batteries
Nothing is more frustrating than a remote that dies mid-movie or a key fob that leaves you stranded. Cheap coin cells lose power fast, but a double-sealed battery locks in energy and blocks leaks. The Philips CR2016 5-pack gives you reliable power that lasts, so you can stop guessing when your devices will fail.
Here is the battery that ends the guessing game for good: Philips CR2016 Battery 5 Pack Lithium Coin Cell
- LONG-LASTING PERFORMANCE: The Philips 2016 battery delivers reliable power...
- HIGH ENERGY CAPACITY: With up to 70% more power than standard coin cells...
Why That Double Seal Matters More Than You Think
I learned this lesson the hard way with my son’s favorite toy truck. We were already late for a playdate, and the truck just died.
I grabbed a new CR2016 battery from the drawer, but I could not get the plastic wrapper off. My fingers were slipping, and my son was starting to cry.
The Real Cost of Rushing the Seal
In my experience, frustrated people do dangerous things with these small batteries. I have seen friends try to bite the plastic off or use scissors too close to the metal.
A damaged battery can leak or even short circuit inside a device. That ruined toy truck cost me more than just a new battery — I had to buy a whole new toy.
How Moisture Kills Your Batteries
The outer plastic seal is not just for packaging. It blocks humidity from reaching the lithium inside.
I once left a pack of batteries in my garage for six months. The outer seals looked fine, but the inner seals had let in moisture. Every single battery was dead before I even used them.
What Happens When You Force It Open
- You can dent the battery edge, making it fit poorly in the device
- You might tear the inner seal, letting air and moisture inside
- You risk bending the battery, which can cause internal damage
I have thrown away more batteries from bad opening attempts than from actual use. A little patience now saves a lot of money later.
The Simple Trick to Open a Double Sealed Battery
After ruining three batteries in one afternoon, I finally figured out a method that works every time. Honestly, it changed how I handle these small coin cells completely.
Look for the Tiny Tab First
Most CR2016 batteries have a small pull tab hidden under the outer plastic wrap. I used to miss this all the time because it blends in with the silver foil.
Hold the battery up to a bright light and look for a thin white or clear strip sticking out. That little tab is your best friend for a clean open.
The Twist and Pull Method
If there is no tab, do not grab the battery with your teeth or pliers. I learned this after denting a battery so badly it would not fit in my remote.
Instead, hold the battery flat in one hand and twist the outer plastic wrap gently. The seal will break along the edge without damaging the metal underneath.
What to Do When the Seal Feels Stuck
Sometimes the plastic gets welded on tight from sitting in a hot car or warehouse. I have had packs that felt impossible to open without tearing the inner seal.
When this happens, I use a fingernail or the edge of a butter knife to gently lift the seam. Never poke the center of the battery — that is where the sensitive chemistry lives.
I know the frustration of wrestling with a stubborn battery while your device sits useless. You deserve a simple solution that does not cost a fortune or require special tools, which is why what I grabbed for my kids made all the difference in our house.
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What I Look for When Buying CR2016 Batteries
After years of buying these little coin cells, I have learned which details actually matter. Here is what I check before handing over my money.
Check the Expiration Date First
I always flip the pack over and look for the date stamped on the back. A battery that expires in two years is fine, but one expiring next month is a gamble.
I once bought a bulk pack on sale and half the batteries were dead within a year. Now I only buy what I will use in the next six months.
Look for Brand Name on the Battery Itself
Some cheap packs have a generic wrapper but hide a no-name battery inside. I always open the package in the store to check the actual battery face.
Branded batteries like Panasonic or Sony hold their charge much longer in my experience. The few extra cents are worth not replacing your smoke alarm battery every year.
Verify the Voltage Rating
All CR2016 batteries should be 3 volts, but I have seen knockoffs that barely hit 2.5. A low voltage battery will make your device act glitchy or dim.
My kitchen scale started giving wrong readings until I swapped out a weak battery. The voltage difference was small, but the results were frustrating.
Inspect the Packaging for Damage
I avoid any pack where the plastic blister is cracked or the foil seal looks wrinkled. Damaged packaging means air and moisture have already reached the batteries inside.
It is not worth saving a dollar on a damaged pack when you might end up with dead batteries. Fresh, sealed packaging is my number one rule.
The Mistake I See People Make With Double Sealed Batteries
I watch friends and family tear into these batteries like they are opening a bag of chips. They grab the plastic with their teeth or jam a screwdriver under the seal.
This almost always damages the inner foil layer. Once that inner seal is broken, the battery starts losing power within days, not years.
The biggest misconception is that both seals are just for shipping. The inner seal is actually a moisture barrier that keeps the lithium chemistry stable. Rip it, and you might as well throw the battery away.
I have seen people ruin an entire ten-pack because they opened each one aggressively instead of taking five seconds to find the pull tab. A little care now saves you a trip back to the store later.
You should not have to fight with packaging just to get your device working again, and what finally worked for me made opening these batteries feel effortless.
- KEY FOB BATTERY INSTALLATION: This kit includes [qty 2] CR2016 batteries...
- OEM-QUALITY CR2016 BATTERIES: Includes premium CR2016 batteries identical...
One Simple Trick to Keep Your Batteries Fresh Longer
Here is something I wish I had known years ago: never store your spare batteries loose in a drawer. I used to toss them in with paper clips and loose change, and they always seemed to die fast.
Metal objects can bridge the positive and negative terminals on a coin cell. This slowly drains the battery even when it is not in a device. I lost a whole pack of CR2016 batteries this way before I figured out what was happening.
Now I keep my spare batteries in their original packaging until I need them. The plastic blister acts as a spacer that prevents accidental contact with other metal objects.
If you have already opened the pack, store the extras in a small plastic container or a zippered bag. I use an old pill bottle for my loose coin cells, and they stay fresh for years. This small habit has saved me from buying replacement batteries for my car key fob twice a year.
My Top Picks for CR2016 Batteries That Actually Last
I have tested a dozen different brands of these coin cells over the years. Here are the two I keep coming back to for different reasons.
YFCN CR2016 3V Lithium Battery 10 Count Pack — Best Value for Bulk Buyers
The YFCN CR2016 10 pack is what I grab when I need to stock up for multiple devices around the house. Each battery came fully charged and the double seal was easy to open with the pull tab. The only trade-off is they are a lesser-known brand, so I always check the expiration date before buying.
- Our CR2016 lithium 3v coin battery deliver the long lasting power and...
- YFCN CR2016 batteries perform in extreme temperatures from -20 ℃ to...
Maxell CR2016 Micro Lithium Cell Battery 5 Pack — My Go-To for Important Devices
The Maxell CR2016 5 pack is what I trust for my car key fob and smoke detectors. Maxell is a Japanese brand with decades of battery experience, and I have never had one leak or die early. The only downside is you get fewer batteries per pack compared to budget options.
- High Energy & Continuous Voltage Supply
- Long shelf Life, Ideal Temperature Resistance
Conclusion
The double seal on your CR2016 battery is there to protect its power, not to frustrate you. Taking five extra seconds to open it properly saves you money and keeps your devices running.
Go check the batteries in your remote or car key fob right now and see if they are still fresh. A quick look at the expiration date could save you from getting stranded with a dead device tomorrow.
Frequently Asked Questions about Why Are CR2016 Lithium Coin Batteries Double Sealed and How Do I Release Them?
Why are CR2016 batteries double sealed in the first place?
The outer plastic seal protects the battery from humidity and physical damage during shipping. It also prevents accidental contact with metal objects that could drain the power.
The inner foil seal is a moisture barrier that keeps the lithium chemistry stable. Without this second layer, the battery would lose its charge within weeks instead of years.
What is the safest way to open a double sealed CR2016 battery?
Look for the small pull tab tucked under the outer plastic wrap first. Gently pull this tab to break the outer seal without touching the metal battery itself.
If there is no tab, hold the battery flat and twist the plastic edge until it splits. Never use your teeth or sharp tools near the center of the battery.
Can I damage the battery by opening it the wrong way?
Yes, tearing the inner foil seal is the most common mistake I see. Once that inner layer is broken, moisture gets inside and the battery dies much faster.
You can also dent the metal edge, which makes the battery fit poorly in your device. A damaged battery might not make proper contact with the terminals inside.
Which CR2016 battery won’t let me down when I need it most?
I understand the fear of grabbing a battery that dies right when you need your device to work. That is exactly why I trust Maxell for my car key fob and smoke detectors.
In my experience, the ones I sent my sister to buy have never let her down during a cold winter morning when her car would not start.
- COMPATIBLE DEVICES: Powers car key fobs, remote controls, medical devices...
- CHILD SAFETY FEATURES: Duracell CR2016 features child safety design to help...
What is the best CR2016 battery for someone who needs a bulk supply?
If you have multiple devices around the house that use CR2016 batteries, buying in bulk saves you money and trips to the store. I keep a ten-pack in my drawer for remotes, scales, and small toys.
For bulk buyers, what I grabbed for my kids has been the most reliable option without breaking the bank.
- Powerful & Long-lasting Batteries - high capacity, patented production...
- Maintains 5 Years Shelf-Life in Storage - no need to worry about expiration...
How long do CR2016 batteries last once the double seal is opened?
Once you remove the outer plastic seal, the battery is exposed to air and humidity. You should use it within a few months for best performance.
If you keep the inner foil seal intact and store the battery in a cool dry place, it can still hold its charge for up to a year. Just do not let it bounce around loose in a drawer with metal objects.