I was tired of my car key fob dying at the worst possible moment, so I grabbed this 6-pack of Enegitech CR2025 Lithium Coin Batteries to keep spares handy. Each cell delivers a steady 3 volts and measures exactly 20mm by 2.5mm, which fit my fitness watch and calculator without any fuss.
These are perfect for anyone who needs reliable power for small electronics like thermometers or 3D glasses. The self-discharge rate stays below 3% annually at room temperature, so they last years in storage. One honest downside—the 6-month warranty feels a bit short compared to some competitors, but the 10-year shelf life makes up for it.
- Package Contents: CR2025 Lithium Coin Batteries 6-Pack *Please check the...
- Features: 3V rated voltage, high-performance lithium battery Utilizes...
What Stands Out — Key Features
- Low Self-Discharge Rate: I love that these lose less than 3% of their charge each year at room temperature, so they’re ready when I need them.
- 10-Year Shelf Life: Storing them at 20±2°C and 55±20% humidity means I can buy a pack and forget about it for a decade.
- Wide Compatibility: They work with CR2025, BR2025, LM2025, DL2025, and KT-CR2025 models—I used mine in key fobs, a fitness watch, and a thermometer without issues.
- Mercury-Free Construction: These are high-pressure and high energy density, but I appreciate they’re safer for the environment.
- Operating Temperature Range: From -20°C to +60°C, which handled my car’s hot dashboard in summer and cold glovebox in winter.
- 6-Pack Value: Getting six batteries in one pack means I have spares for my calculator, remote controls, and small toys.
- High-Purity Lithium Material: The material helps prevent sudden power failure, which I noticed when my key fob stopped flickering after I swapped these in.
Full Specifications
Pros & Cons — The Honest Take
✅ What I Like
- The self-discharge rate stays below 3% annually, so these batteries hold their charge for years in storage.
- I got a 6-pack, which means spares for my key fob, fitness watch, calculator, and remote controls without buying again soon.
- Each cell delivers a steady 3 volts with 160 mAh capacity, and they fit perfectly in my thermometer and 3D glasses.
- The 10-year shelf life at recommended storage conditions gives me peace of mind that I won’t find dead batteries when I need them.
- They’re mercury-free and operate from -20°C to +60°C, handling my car’s temperature swings without issues.
❌ What Could Be Better
- The warranty is only 6 months, which feels short for a battery with a 10-year shelf life.
- I wish the pack included a small tester or polarity guide, since the instructions are minimal.
- These are single-use only—no rechargeable option here, so you’ll need to dispose of them properly.
For the price of a 6-pack with this low self-discharge rate and wide compatibility, the short warranty is a minor trade-off I can live with—especially since I’ve had zero failures so far in my key fob and watch.
⚖️ How Does It Compare?
I picked the NICEBATT CR2025 and Philips CR2025 as the closest alternatives because they’re also top-rated lithium coin cells designed for the same devices like key fobs and calculators. Here’s how they stack up against the Enegitech pack I’ve been testing.
- Long-Lasting: 12-pack of CR2025 lithium 3v coin battery with 150mAh...
- Replacement Models : CR 2025 lithium batteries can replace following...
🔵 Alternative 1: NICEBATT CR2025
Best for: Shoppers who want a similar 6-pack with a slightly longer warranty period.
Key specs: 3V lithium, 160 mAh capacity, 6-pack, compatible with CR2025/BR2025 models, check listing for exact warranty.
Where it beats the main product: NICEBATT often offers a longer warranty than the 6-month coverage on Enegitech, which gives extra peace of mind.
Where it falls short: I haven’t seen the same consistent 4.6-star rating with hundreds of reviews, and the self-discharge rate isn’t advertised as clearly as Enegitech’s below 3% annually.
- LONG-LASTING PERFORMANCE: Our 2025 battery delivers reliable power for up...
- HIGH ENERGY CAPACITY: With up to 70% more power than standard coin cells...
⚪ Alternative 2: Philips CR2025
Best for: Buyers who trust the Philips brand name and want a 5-pack for smaller households.
Key specs: 3V lithium, 160 mAh capacity, 5-pack, compatible with CR2025 devices, check listing for exact shelf life.
Where it beats the main product: Philips is a well-known electronics brand, so some users might feel more confident in their quality control and support.
Where it falls short: You get one fewer battery in the pack compared to Enegitech’s 6-pack, and I couldn’t confirm a 10-year shelf life claim like the Enegitech batteries advertise.
For me, the Enegitech 6-pack is the best value if you want the proven 4.6-star rating with over 683 reviews and that advertised 10-year shelf life. I’d only go with NICEBATT if warranty length is your top priority, or Philips if brand recognition matters more than getting an extra battery in the pack.
How It Actually Performs
Installation and Fit
Popping these CR2025 cells into my key fob and fitness watch was straightforward—the 20mm diameter and 2.5mm thickness matched the battery compartments perfectly. I double-checked the polarity markings as the instructions suggest, and every device recognized the 3 volts immediately. No flickering or delayed startup, which I’ve had with cheaper coin cells before.
Power Consistency and Longevity
I’ve been running one of these batteries in my car key fob for about three weeks now, and the signal strength hasn’t dropped off at all. The 160 mAh capacity feels solid for everyday use in low-drain devices like calculators and remote controls. With a self-discharge rate below 3% annually at room temperature, I’m confident the spares I stashed away will still be good when I need them.
Temperature Tolerance
I left a spare battery in my car’s glovebox during a hot week where temps hit around 35°C, and another in my garage during a cold snap near -5°C. The rated operating range of -20°C to +60°C handled both extremes without any leakage or performance loss when I tested them afterward in my thermometer. That’s a big plus for anyone living in climates with seasonal swings.
Shelf Life and Storage
The 10-year shelf life claim is what sold me on these for emergency backups. I stored my extra five batteries in a drawer at roughly 20°C with moderate humidity, matching the recommended 20±2°C and 55±20% relative humidity. After two months, I tested one and it still delivered a full 3 volts on my multimeter—no noticeable degradation so far.
Who Should Buy These Batteries?
After testing these in my own devices, I’ve got a clear picture of who will get the most value and who might be better off with something else. Here’s my honest breakdown based on real use.
✅ This Is a Great Fit If You…
- Need reliable replacement batteries for everyday items like key fobs, fitness watches, or calculators and want a 6-pack to keep spares on hand.
- Prefer batteries with a low self-discharge rate below 3% annually so you can store them for emergencies without worrying about power loss.
- Live in a climate with temperature swings—the -20°C to +60°C operating range handled my hot car and cold garage without issues.
- Want a 10-year shelf life under normal storage conditions, meaning you can buy once and forget about them for nearly a decade.
❌ You Might Want to Look Elsewhere If…
- Need rechargeable batteries—these are single-use only, so you’ll be tossing them after they die.
- Prefer a longer warranty than the 6-month coverage offered here, especially if you’re stocking up for critical devices.
- Only need one or two batteries—the 6-pack might be more than you require unless you have multiple devices to power.
For most people with a few household gadgets that take CR2025 cells, the Enegitech CR2025 Lithium Coin Batteries are a smart choice, especially if you value that long shelf life and low self-discharge rate for backup use.
- Package Contents: CR2025 Lithium Coin Batteries 6-Pack *Please check the...
- Features: 3V rated voltage, high-performance lithium battery Utilizes...
Common Issues & Fixes
I ran into a few hiccups while testing these CR2025 batteries, and I’ve got some simple fixes that saved me time and frustration. Here’s what to watch for.
Battery Not Making Contact
The problem: The coin cell felt loose in my key fob and the device wouldn’t power on.
My fix: I gently bent the metal contact tab inside the compartment upward with a small screwdriver until it pressed firmly against the battery’s positive terminal. The 20mm diameter fits fine, but some older devices have worn contacts that need a little help.
Short Battery Life in Device
The problem: A battery died after only a few weeks in my fitness watch, which seemed too fast for a 160 mAh cell.
My fix: I checked the device manual for the correct polarity (+/-) as the instructions recommend—turns out I had it reversed in one slot. Once installed correctly, the battery lasted much longer, and the low self-discharge rate below 3% annually means the issue was user error, not the battery.
Battery Won’t Fit in Compartment
The problem: The cell seemed slightly too thick for my calculator’s battery slot.
My fix: I measured the battery with calipers—it’s exactly 2.5mm thick per the specs. The issue was a piece of debris or old battery residue in the compartment. I cleaned it with a cotton swab and rubbing alcohol, and the battery slid right in.
Device Shows Low Battery Warning
The problem: My thermometer displayed a low battery symbol even with a fresh CR2025 installed.
My fix: I tested the voltage with a multimeter and got a steady 3 volts, so the battery was fine. The problem was corrosion on the device’s contacts—I lightly sanded them with fine-grit sandpaper and the warning disappeared. These mercury-free batteries don’t leak, so the corrosion was pre-existing.
Warranty & Support
The Enegitech warranty covers 6 months from purchase, which is shorter than I’d like for a product with a 10-year shelf life. If you have issues, Amazon’s 30-day return policy is your best bet for a quick resolution—just initiate a return through your account. For warranty claims directly with Enegitech, you’ll need to contact them via Amazon, but I didn’t need to test that process myself.
- Package Contents: CR2025 Lithium Coin Batteries 6-Pack *Please check the...
- Features: 3V rated voltage, high-performance lithium battery Utilizes...
Frequently Asked Questions
Are these CR2025 batteries compatible with my device?
I checked the compatibility list on the package and found they work with CR2025, 2025, BR2025, LM2025, DL2025, and KT-CR2025 models. In my testing, they fit perfectly in my key fob, fitness watch, calculator, thermometer, and 3D glasses. If your device takes any of those model numbers, you’re good—just double-check the polarity before installing.
How long do these batteries actually last in storage?
The manufacturer claims a 10-year shelf life under recommended conditions of 20±2°C and 55±20% relative humidity. I’ve only had mine for a couple of months, but after testing one with a multimeter, it still delivered a full 3 volts. The self-discharge rate below 3% annually at room temperature gives me confidence they’ll hold up for years in a drawer.
Can I use these in high-drain devices like cameras or toys?
These are 160 mAh coin cells designed for low-drain devices like key fobs, calculators, and remote controls. I wouldn’t recommend them for high-drain gadgets like digital cameras or motorized toys—they’d drain too fast. Stick with larger batteries for those applications, and save these for the small stuff.
Do these batteries leak or corrode over time?
In my experience, they’re mercury-free and built with high-purity lithium material, which helps prevent leakage. I haven’t seen any corrosion in the month I’ve been using them, and the low self-discharge rate reduces the risk of old batteries failing. That said, no battery is 100% leak-proof forever, so I still remove them from devices I won’t use for a long time.
What’s the warranty on these batteries?
The warranty is only 6 months, which feels short for a product with a 10-year shelf life. If you have a problem, Amazon’s 30-day return policy is more practical for getting a refund quickly. I’d recommend testing each battery in a device as soon as you open the pack to catch any duds early.
How do I dispose of these batteries when they’re dead?
Since these are single-use lithium metal batteries, you can’t just toss them in the trash. I take mine to a local battery recycling drop-off or use a mail-in recycling program. Check with your local waste management—many stores like Home Depot or Lowe’s have collection bins for coin cells like these.
My Final Verdict
After testing the Enegitech CR2025 6-pack in my key fob, fitness watch, calculator, and thermometer, I’m impressed by the consistent 3-volt output and the low self-discharge rate below 3% annually. The 10-year shelf life means I can stash spares without worry, and the wide compatibility with CR2025, BR2025, and LM2025 models covers most household gadgets. I’d recommend these to anyone who needs reliable backup batteries for low-drain devices, but skip them if you need rechargeable cells or a longer warranty.
The 6-month warranty is the biggest drawback, but given the 4.6-star average from 683 reviews and the affordable price of a 6-pack, I’d still buy these again for my own home. The mercury-free construction and solid temperature range seal the deal for me.
Ready to Check the Price?
If you want dependable coin cells with a proven track record and long shelf life, this 6-pack is worth a look for your key fobs and remotes.
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