LeFixReplacement 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.

CMOS battery died on al older Dell laptop.Found this one on Amazon. Arrived on time.Put it in the laptop and it works.It is a battery...what else can I say.

Packed safely (anti-static bag), and works as advertised in a Latitude D520.

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

There are a number of different sizes of the tiny connector on the battery. It's difficult to identify which one match it to the ones on the batteries being sold. The battery works great if you get the right one.