---
product_id: 241131084
title: "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)"
brand: "rome tech"
price: "¥2544"
currency: JPY
in_stock: true
reviews_count: 8
category: "Rome Tech"
url: https://www.desertcart.jp/products/241131084-rome-tech-ml1220-cmos-battery-for-dell-vostro-15-5510
store_origin: JP
region: Japan
---

# Pre-charged 2.7-2.8V, recharges to 3.0V Rechargeable ML1220 tech Plug & play 2-wire cable design 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)

**Brand:** rome tech
**Price:** ¥2544
**Availability:** ✅ In Stock

## Summary

> 🔋 Power your BIOS, power your productivity — never miss a beat!

## Quick Answers

- **What is this?** 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) by rome tech
- **How much does it cost?** ¥2544 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/241131084-rome-tech-ml1220-cmos-battery-for-dell-vostro-15-5510)

## Best For

- rome tech enthusiasts

## Why This Product

- Trusted rome tech brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact & Universal Fit:** Slim, space-saving design fits seamlessly into Dell Vostro 15 5510 and XPS 13 motherboards with 2-pin connectors.
- • **Effortless BIOS Revival:** Replace your dead CMOS battery in just 10 minutes and bring your Dell Vostro or XPS back to life without hassle.
- • **Plug-and-Play Simplicity:** Includes a 2-wire cable for quick, secure installation—no tech degree required, just a screwdriver and confidence.
- • **Trusted by Professionals:** Highly rated with 4.4 stars and praised for durability and ease, this battery is the go-to choice for savvy laptop maintainers.
- • **Long-Lasting Rechargeable Power:** Pre-charged and designed to recharge within your laptop, ensuring up to 8 years of reliable BIOS backup.

## Overview

The Rome Tech ML1220 CMOS Battery is a rechargeable, pre-charged lithium-ion battery designed specifically for Dell Vostro 15 5510 and XPS 13 laptops. Featuring a compact form factor with a 2-wire cable connector, it ensures quick installation and reliable BIOS timekeeping. With a voltage range of 2.6-2.8V on arrival, it recharges to 3.0V in-device, promising long-term durability and seamless laptop performance restoration.

## Description

Buy 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): Batteries - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Fits and works on a 2016 Dell XPS 13 - 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!
Review: Works for Dell XPS 9570 - 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!

## Features

- PLEASE NOTE: ML1220 batteries are rechargeable and come pre-charged to 2.7-2.8V. The computer will recharge them to 3v after installation. The battery may arrive at 2.6–2.8 V; the computer will recharge it to 3.0 V after installation for normal use.
- Compatible with Dell Vostro 15 5510
- Enjoy extended reliability of the ML1220 battery and heat shrink of a high caliber - the CMOS battery will last you for a long time
- The size of the entire unit is extremely small - will fit in almost any electronic device requires Battery connector with 2 pins and 2 wires
- Quick and simple battery installation takes only 10 minutes of your time. Try our customer service for resolving any issues during battery replacement

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08LBR15JK |
| Batteries | 1 Lithium Ion batteries required. |
| Best Sellers Rank | #40,522 in Electronics ( See Top 100 in Electronics ) #406 in Laptop Batteries |
| Customer Reviews | 4.4 4.4 out of 5 stars (139) |
| Date First Available | October 17, 2020 |
| Item Weight | 0.317 ounces |
| Item model number | CMOSRTB227 |
| Manufacturer | Rome Tech |
| Package Dimensions | 5.43 x 4.21 x 0.31 inches |

## Product Details

- **Battery Capacity:** 200 Milliamp Hours
- **Battery Cell Composition:** Lithium Ion
- **Brand:** Rome Tech
- **Number of Batteries:** 1 Lithium Ion batteries required.
- **Recommended Uses For Product:** Laptop

## Images

![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) - Image 1](https://m.media-amazon.com/images/I/61AFgkSGbUL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: What are the dimensions: thickness and diameter.?  not package dimensions (useless information).**
A: Hi, cable is 4.5cm. Battery dims are 12.5mm in diameter and 2mm in height.

**Q: Do the metal pins go up or down and are you supposed to hold on button while installing**
A: I installed my CMOS on a Dell XPS-15 Model 9570. CONDUCT YOUR RESEARCH VIA GOOGLE SEARCH! Some very-explicit instructional monologues and YouTube videos, which I did access, for my removal and installation. You do know, you must-LITERALLY-disassemble the entire computer. AND YOU MUST HAVE ON HAND, FOR REASSEMBLY, 1) high-quality grease, to reattach the heat sink, to the CPU, and, 2) a good, safe solvent, as 91% isopropyl alcohol, to COMPLETELY remove the old grease, and, 3)some super-fine grit sandpaper or emory cloth, to remove old grease residue, AND POLISH THE HEAT SINK AND CPU CONTACT SURFACES, TO A MIRROR FINISH---NO JOKE! And it is only a grease, not a glue or adhesive, you will remove, and reapply. Male plug only inserts into female receptacle one way, as a security feature, to prevent reverse-polarity mistake. There is no physical reset "button" to actuate; you must reset the Real Time Clock (RTC) via settings---easy task for the RTC set. AGAIN, FIND YOUR MONOLOGUES AND VIDEOS.

**Q: Will this work for a XPS 9550?**
A: Hello,

Yes, this RTC CMOS battery work,

**Q: Will this work in an XPS 15 9530?**
A: Yes, it worked fine in mine.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Fits and works on a 2016 Dell XPS 13
*by T***5 on January 27, 2026*

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!

### ⭐⭐⭐⭐⭐ Works for Dell XPS 9570
*by I***R on February 13, 2025*

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!

### ⭐⭐⭐⭐⭐ Great team behind product.
*by V***D on July 3, 2025*

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

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-03-11*