Rome Tech CMOS Battery for Lenovo ThinkPad X1 Carbon 4th Gen (Type 20FB, 20FC) - BIOS RTC 3V CR2016 X1 with 2 Pin 2 Wire Cable (2-Pack)

This product fulfilled the purpose i wanted it for. It fit very well with only the expected changes. I am happy with this product.

Very simple to install but is located under the main battery. You may want to replace both since the main battery has to come out anyway. Very reasonable price

Perfect replacement for easy install.

Replaced the CMOS on an old lenovo thinkpad. It worked

I had to modify by splicing to my old connector despite coming up in searches for my specific thinkpad model, but I haven't thought about it in a long time which I guess is the point

Battery is much better than the 5 year old one in the laptop.

While this worked fine replacing the dead CMOS battery in my X1 Yoga Gen 3, keep in mind that this isn't quite as device-specific as the item title makes it out to be.The plug fits fine, but the wire is about twice as long as the OEM part. Also, the OEM battery is about as flat as a CR2032 battery with two-sided tape. This battery is about twice as thick and uses puffy 3M double-sided tape.In the X1 Yoga G3, there was enough clearance for the bottom shell, and the wire wasn't too difficult to stuff behind the shielding, but if your application has tighter tolerances, this isn't a like-for-like part.

USED THIS ON A LENOVO L13 GEN 2 INTEL CORE i5-1145G7. WORKS LIKE A CHARM.

It still makes beep sound and is overpriced as well.