CMOS Battery RTC Memory BIOS Battery for DELL Latitude E5440 E5450 E6440 E6420 E7440 E7240,Alien-Ware M18x,M18xR2,14 R1,18 R1,13,17 R2,15 R1,15 R2,17 R3,13 R2,15 R3,17 R4|for Inspiron 4050(Black)

My mini PC had one of these that had failed, and it would cause the PC to reset the CMOS on every boot, which would take a minute or two when rebooting rather than the usual 15 seconds. Once I figured out that it was caused by the CMOS backup battery, I found this replacement and it worked perfectly. I can't speak to longevity as I've only had it in the PC for about a month, but I did test it with a multimeter and it had the expected voltage when it arrived.

Whats to review on a CMOS battery... Pro: 1. It plugged in. 2. It worked. 3. Laptops good now Con: now I have to toss the old battery out 🤷

I'm giving it five stars since it's my fault for not noticing the length of the wires. This battery's wires were too short for my Dell laptop.

Very easy to install

La utilicé para mi dell predicción m6700 y funcionó muy bien la que tenía ya no funcionaba, buena relación costo calidad.

Using a dell latitude E6420 laptop, realizing that it wasn't keeping the time, and needed to get new CMOS battery, and this one worked perfectly.

it isn't that hard to pop the back off and swap out this battery. And now my laptop is functioning like new again (for a very small price.)

Just worked.