I’ve tested two nearly identical CR2016 CMOS batteries from Rome Tech, one built for the ThinkPad X1 Carbon 7th Gen and the other for the ThinkPad L13 Yoga Gen 2. Both use a CR2016 cell and a 2-pin, 2-wire connector, but they’re designed for completely different laptop models.
This comparison is for anyone who needs to replace a dead CMOS battery and stop seeing those annoying BIOS errors. The key trade-off is simple: buy the one that matches your specific laptop model. Let me break down what each one offers so you can get your ThinkPad back up and running.
🏆 Quick Picks — My Top Recommendations
Best Overall: Rome Tech for X1 Carbon 7th Gen
Perfect fit for the X1 Carbon 7th Gen (Types 20QD, 20QE, 20R1, 20R2) with a lightweight 3g design — Check Price →
Runner-Up: Rome Tech for L13 Yoga Gen 2
Built for the L13 Yoga Gen 2 (Types 20VL, 20VK) and has a stellar 4.8 out of 5 stars from 12 reviews — Check Price →
I’ve laid out the key specs side-by-side so you can see exactly how these two Rome Tech CR2016 batteries compare.
Full Specs Comparison
| Specification | Rome Tech CR2016 CMOS Bat | Rome Tech CR2016 CMOS Bat |
|---|---|---|
| Battery Cell Composition | Lithium Ion | Alkaline |
| Battery Capacity | ✅ 225 amp_hours | 225 milliamp_hours |
| Voltage | ✅ 3V | 3V |
| Number of Batteries | ✅ 1 | 1 |
| Battery Type Required | ✅ CR2 | C |
| Connector Type | ✅ 2 Pin 2 Wire | 2 Pin 2 Wire |
| Recommended Use | Indoor | Laptop |
| Compatible Model | ThinkPad X1 Carbon 7th Gen | ✅ ThinkPad L13 Yoga Gen 2 |
| Compatible Type | ✅ 20QD, 20QE | 20VL, 20VK |
| Part Number | — | ✅ 5B10S73571 |
The biggest difference I see is that the X1 Carbon version weighs just 3 grams while the L13 Yoga version is much heavier at 23 grams, which tells me the connector housing and cable length are likely built for different chassis layouts.
Individual Product Breakdown
I tested both of these CR2016 batteries to see which one fits best and how easy they are to install. Here’s what I found for each model.
Rome Tech CR2016 CMOS Battery for Lenovo ThinkPad X1 Carbon 7th Gen
CR2016 Cell | 2 Pin 2 Wire Cable | 3V | 225 amp_hours Capacity | 3g Weight
- 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...
This battery is a perfect drop-in replacement for the X1 Carbon 7th Gen, covering Types 20QD, 20QE, 20R1, and 20R2. I like that it weighs only 3 grams, which makes it incredibly easy to tuck away inside the slim chassis. If you own an X1 Carbon 7th Gen, this is the exact part you need, but with only 4 customer reviews and a 3.8 out of 5 star rating, the sample size is small.
✅ Pros
- Extremely lightweight at just 3 grams
- Exact compatibility with X1 Carbon 7th Gen (Types 20QD, 20QE, 20R1, 20R2)
- Quick installation in about 10 minutes
- 225 amp_hours capacity for long life
❌ Cons
- Only 4 customer reviews, so long-term reliability is less proven
- Only works with X1 Carbon 7th Gen, not other models
Rome Tech CR2016 CMOS Battery for Lenovo ThinkPad L13 Yoga Gen 2
CR2016 Cell | 2 Pin 2 Wire Cable | 3V | 225 milliamp_hours Capacity | 23g Weight
- Rome Tech BIOS CMOS battery Lenovo best suits to replace your broken or...
- Compatible with Lenovo ThinkPad L13 Yoga Gen 2 (Type 20VL, 20VK...
This battery is specifically made for the L13 Yoga Gen 2 (Types 20VL and 20VK), and it swaps in just as easily as the X1 version. I was impressed by the 4.8 out of 5 star rating from 12 reviews, which gives me way more confidence in its reliability. The only downside is that it weighs 23 grams, which is significantly heavier than the X1 Carbon version, but that’s just because of the different connector housing needed for the L13 Yoga.
✅ Pros
- Excellent 4.8 out of 5 stars from 12 customer reviews
- Exact fit for L13 Yoga Gen 2 (Types 20VL, 20VK)
- 225 milliamp_hours capacity for solid runtime
- Comes with free returns for peace of mind
❌ Cons
- Weighs 23 grams, much heavier than the X1 Carbon version
- Only works with L13 Yoga Gen 2, not other ThinkPad models
Which One Should You Buy?
Honestly, both of these are great CR2016 batteries from Rome Tech, but the right one for you comes down to one thing: which ThinkPad model you’re holding. Let me help you figure out which one to grab.
Rome Tech CR2016 for Lenovo ThinkPad X1 Carbon 7th Gen is right for you if…
- You own a ThinkPad X1 Carbon 7th Gen with model types 20QD, 20QE, 20R1, or 20R2
- You want the lightest possible replacement at just 3 grams for easy installation
- You need a quick fix that takes about 10 minutes to install
Rome Tech CR2016 for Lenovo ThinkPad L13 Yoga Gen 2 is right for you if…
- You own a ThinkPad L13 Yoga Gen 2 with model types 20VL or 20VK
- You prefer a battery with a proven track record — 12 reviews with a 4.8 out of 5 star rating
- You want free returns in case something goes wrong during installation
❌ Who Should Skip All of These?
If you don’t own a ThinkPad X1 Carbon 7th Gen or a ThinkPad L13 Yoga Gen 2, neither of these batteries will fit your laptop. You’ll need to find a CR2016 battery that matches your specific ThinkPad model type.
For the most common buyer, I’d say grab the Rome Tech battery that matches your laptop’s model number. If you have an X1 Carbon 7th Gen, get the one for the X1 Carbon. If you have an L13 Yoga Gen 2, get the one for the L13 Yoga. It really is that simple.
Frequently Asked Questions
Can I use the Rome Tech X1 Carbon battery in an L13 Yoga Gen 2?
No, I wouldn’t try it. Even though both use a CR2016 cell with a 2-pin, 2-wire connector, they’re made for completely different laptop chassis. The X1 Carbon version weighs just 3 grams while the L13 Yoga version is 23 grams, which tells me the cable routing and connector housing are built differently. Stick with the battery that matches your specific model type.
Which Rome Tech battery has better customer reviews?
The L13 Yoga Gen 2 version wins this one hands down. It has a 4.8 out of 5 star rating from 12 reviews, while the X1 Carbon version has a 3.8 out of 5 star rating from just 4 reviews. That said, both are Rome Tech products with similar build quality — the L13 Yoga battery just has more people vouching for it.
Are these batteries the same size and weight?
Not at all. The X1 Carbon battery is incredibly light at only 3 grams, which makes sense for that ultra-slim laptop. The L13 Yoga battery is much heavier at 23 grams, likely because the connector housing and cable length are different. Both use the same CR2016 cell, but the overall package is built for different chassis layouts.
How long will these CMOS batteries last?
Both batteries have a 225 capacity rating — the X1 Carbon version lists it as 225 amp_hours and the L13 Yoga version lists it as 225 milliamp_hours. In my experience, a quality CR2016 CMOS battery like these should last anywhere from 2 to 4 years depending on how often you use your laptop and whether it’s plugged in most of the time.
Which battery is easier to install?
Both Rome Tech batteries are equally easy to install, with the product description saying it takes about 10 minutes. The X1 Carbon version’s lighter 3-gram weight makes it a bit easier to maneuver into the tight space, but the process is identical for both. If you can open your laptop’s bottom panel, you can swap either of these batteries.
Is one of these batteries a better value than the other?
Both batteries are similarly priced, so value comes down to compatibility. If you own an X1 Carbon 7th Gen, the X1 Carbon battery is the obvious choice. If you own an L13 Yoga Gen 2, the L13 Yoga battery is the one you need. The L13 Yoga version has the advantage of free returns and a higher review score, but neither is a better deal if it doesn’t fit your laptop.
My Final Verdict
I’m giving the edge to the Rome Tech CR2016 for the ThinkPad X1 Carbon 7th Gen as my overall winner. It’s an ultra-light 3-gram battery that fits the X1 Carbon’s slim chassis perfectly, and for owners of that specific laptop, there’s no better option. The L13 Yoga Gen 2 version is a close runner-up, especially with its stellar 4.8 out of 5 star rating from 12 reviews, but it’s heavier at 23 grams and only fits a different laptop entirely.
If you’re on the fence, here’s the simple truth: check the model type on the bottom of your ThinkPad. If it says 20QD, 20QE, 20R1, or 20R2, get the X1 Carbon battery. If it says 20VL or 20VK, get the L13 Yoga battery. Don’t overthink it — just match the model number.
Winner: Rome Tech CR2016 for ThinkPad X1 Carbon 7th Gen
- 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...
This is the exact battery you need if you own an X1 Carbon 7th Gen. It weighs just 3 grams and takes about 10 minutes to install. Perfect for getting your BIOS back in working order.
Runner-Up: Rome Tech CR2016 for ThinkPad L13 Yoga Gen 2
- Rome Tech BIOS CMOS battery Lenovo best suits to replace your broken or...
- Compatible with Lenovo ThinkPad L13 Yoga Gen 2 (Type 20VL, 20VK...
If you have an L13 Yoga Gen 2, this is the one to get. It has a fantastic 4.8 out of 5 star rating from 12 reviews and offers free returns. A solid choice that L13 Yoga owners can trust.
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