- Rome Tech CMOS Battery for Lenovo ThinkPad X1 Carbon (Gen 2-6 Type 20FB 20FC), X1 Yoga (Gen 1-3), X280, X390 Yoga, X13 Yoga (Gen 1-3), X13 Gen 1 – BIOS RTC 3V CR2016 2-Pin Cable

If you have a Gen 7 and need a CMOS battery, this is your guy. I replaced mine due to my computer being unable to hold onto the current date and time then loudly complaining about it, which per Google can be the CMOS battery. And it was! I waited a couple months to review in case I was wrong or this battery craps out but so far it’s perfect. Replacing was much harder for me than the online demos suggested because I could not unscrew multiple internal screws (even with my appropriately tiny screwdrivers!) and I was too impatient to order then wait for a tiny screw removal tool. There were at least 4 more tiny screws in my computer than on the pictures of what’s supposed to be inside my computer lol. I ended up risking damage by very slightly bending the plastic I couldn’t get off and squeezing this little guy in. This ultimately made it slightly harder to get the external cover back on but I managed. None of this is the fault of this battery, I blame Lenovo and myself. : ) If I were to do this again, I’d order a tiny screw removal tool and maybe better tiny screwdrivers.

This is just what I was needing, saved me from soldering the power cord onto a battery, something I wasn't wanting to do. Great for a Lenovo laptop.

Aside from the nightmare location deep inside my X1 Carbon that the battery was located (no fault of Rome Tech obviously) this was an easy install. Connector worked perfect and battery worked perfect. No more errors when the laptop would go dead. Good as new again!

I have an older Lenovo X1 Carbon that would loose it's CMOS time and date settings when the main battery became sufficiently depleted. Replacing the CMOS memory battery with this one fixed the problem. Although the standard instructions for replacing this battery commonly suggest discharging the main battery completely, this is not necessary if you are careful when working on the computer. (It's probably better not to do this if you are not experienced in laptop repair.) Only time will tell whether this battery will last as long as the original. However, they are inexpensive and typically these coin cells will last several years.

Slightly thicker than one I was replacing but fit fine. Might have been the adhesive backing. Packaged in a big box like about 6x6x6 when an envelope would suffice.

No more CMOS warning. Hope it lasts a long time. Been going strong for a little while now.

Fixed my problem at a good price. Just make sure you order the correct battery for your model.

Cable is of course a tad longer than the OEM but it works just perfectly. No issues. Will purchase again.