Rome Tech ML1220 CMOS Battery for Dell Vostro 15 5510 – BIOS RTC ML1220 XPS 13 Rechargeable CMOS Battery for PC Motherboard with 2 Wire Cable (1-Pack)

When my BIOS kept losing time, I knew it was time for the dreaded CMOS battery update. After much research, I learned that it wasn’t a simple matter of just replacing a bare watch battery on the mainboard and that laptops favor rechargeable batteries nowadays. So, after confirming this was indeed the right part for my Dell XPS 9570 and that my Microsoft Bitlocker was disabled, I went about following a YouTube video that showed me how to remove the mainboard and flip it over so that I could replace the battery on the bottom left of the mainboard. (Why???? Did they put it under the bottom???). It was easy to unplug the old one and plug in the new one. (I did it fast so that I would not have to lose the BIOS settings.). I like that the new battery also has the adhesive pad. Then I had to figure out what to do with the cord…. As another review mentioned, the cord is rather long. After reassembling my iPad and starting it up, it booted right up after a nerve-racking longer than usual pause and asked me for the time and date for one last time. The dreaded job was done!!! I was so thrilled, I even braved bricking my laptop by updating my BIOS afterwards. I hope that this 3 to 8 year part lasts closer to the 8 years! All in all, this little battery seems to have been a great purchase!

Fits and works on a 2016 Dell XPS 13 perfectly. If your laptop doesn’t turn on when you press the power button, it’s likely that the CMOS battery is dead. Once I replaced it with this battery, my laptop boots up!

Direct fit for Razor Blade 15 laptop. Fixed power on loop problem.

PSA: This item DOES NOT fit an Intel Compute Stick! That being said, the item is exactly as described, and is 100% meant for the PC in the title of the item. I’m just putting this review here for anyone else who might pick this up for an Intel Compute Stick like I did. The battery is correct, but the wires and pin connection will not work on anything besides what the seller listed.

While it appears to work fine, the wire was a bit too long for the space. (Space in laptops is always at a premium.) I managed to cram it in there however. Ease of installation isn't really Rome Tech's problem. For that I blame Dell for requiring me to almost completely disassemble the laptop to access the CMOS battery. Replacement would have been substantially easier if Dell's designers had considered perhaps placing the battery on the *other* side of the motherboard. Sheesh...

Great seller - great product. Fixed my XPS - thanks Rome Tech!

I ordered this ML1220 battery expecting a fresh one, but when I checked the voltage it was only 2.79V. A new ML1220 should be at least 3.0V or higher. This means the battery was already discharged upon arrival, which makes it unreliable for use. Very disappointed. I requested a refund.

Installed on a XPS Dell computer from 2017, giving it a second life... Worked like a charm!