LeFix Replacement CMOS Battery for DELL Latitude D620 D630 D810 D830 E6420 E6430 E6520 E6530 E6540|Latitude 5480/5490,5470, 7470, 7480/7490, 7280/7290, 7390|N4050 E7270 M4600

I'll change review if there's anything different over time. I doubt I'll get 13 years like I got out of the original, but whatever; CMOS batteries are just always hit and miss no matter what.On the Latitude E6420 you'll have to trim some of the corners off. Out of clinical paranoia, I'd suggest leaving some of it behind like I did, but there's plenty of room in the location to firmly fit the thing if you cut maybe half of each corner off, which is easy.Piece of cake.

This brought an old friend back to life. Installation took all of fifteen minutes, mabye 30...

Great product, fast shipping, good communication. I will do business with this seller again.

Easy to install if you are comfortable opening a laptop. YouTube has good videos on how to do this, and make sure you have a good mini-screwdriver set before you begin. Would recommend 10/10.

Excelente producto

Does what it needs to do.

Worked when I put it in and continues to work. Saved an old laptop.

I can confirm this cmos battery does NOT work with the Latitude 3570 model. The port sizes are not the same. Hopefully that can save someone some time and money.