---
product_id: 523926684
title: "Rome Tech ML1220 CMOS BIOS Battery for Dell Precision 5510, 5520, 5530, 5540, 5290 2-in-1 - Rechargeable Laptop Backup RTC with 2 Wire Cable"
brand: "rome tech"
price: "฿951"
currency: THB
in_stock: true
reviews_count: 3
category: "Rome Tech"
url: https://www.desertcart.co.th/products/523926684-rome-tech-ml1220-cmos-bios-battery-for-dell-precision-5510
store_origin: TH
region: Thailand
---

# 225mAh Lithium-Ion Capacity 3V Rechargeable Power 2-Wire Plug & Play Connector Rome Tech ML1220 CMOS BIOS Battery for Dell Precision 5510, 5520, 5530, 5540, 5290 2-in-1 - Rechargeable Laptop Backup RTC with 2 Wire Cable

**Brand:** rome tech
**Price:** ฿951
**Availability:** ✅ In Stock

## Summary

> 🔋 Power your precision with Rome Tech’s sleek, rechargeable BIOS battery—never miss a beat!

## Quick Answers

- **What is this?** Rome Tech ML1220 CMOS BIOS Battery for Dell Precision 5510, 5520, 5530, 5540, 5290 2-in-1 - Rechargeable Laptop Backup RTC with 2 Wire Cable by rome tech
- **How much does it cost?** ฿951 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/523926684-rome-tech-ml1220-cmos-bios-battery-for-dell-precision-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 Powerhouse:** Ultra-small form factor with heat shrink protection for durable, space-saving use
- • **Quick & Simple Swap:** Install in under 10 minutes with plug-and-play 2-wire cable—no tech headaches
- • **Effortless Compatibility:** Seamlessly fits Dell Precision 5510-5540 & Latitude 5290 2-in-1 models
- • **Premium Support Included:** Dedicated customer service ready to assist your battery replacement journey
- • **Rechargeable Reliability:** Maintains optimal 3V voltage after installation for long-lasting RTC backup

## Overview

The Rome Tech ML1220 CMOS BIOS Battery is a rechargeable 3V lithium-ion backup battery designed specifically for Dell Precision 5510, 5520, 5530, 5540, and Latitude 5290 2-in-1 laptops. Featuring a compact size and 2-wire connector, it ensures quick installation and reliable RTC performance, backed by premium quality and customer support.

## Description

Buy Rome Tech ML1220 CMOS BIOS Battery for Dell Precision 5510, 5520, 5530, 5540, 5290 2-in-1 - Rechargeable Laptop Backup RTC with 2 Wire Cable: Batteries - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Ordered New, Recieved used instead. - Ordered New, Recieved used instead.
Review: Low voltage - I measured voltage is 2.6 Volts not 3 volts . I returned.

## Features

- Rome Tech BIOS CMOS battery ML1220 best suits to replace your broken or non-working old battery - we provide premium quality only. The battery may arrive at 2.6–2.8 V; the computer will recharge it to 3.0 V after installation for normal use.
- RTC rechargeable battery compatible with such models as: Dell Precision 5510 / Dell Precision 5520 / Dell Precision 5530 / Dell Precision 5540 / Dell Latitude 5290 2-in-1
- Enjoy extended reliability of the CMOS 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 3V battery connector with 2 pins and 2 wires
- Quick and simple battery CMOS installation takes only 10 minutes of your time. Try our customer service for resolving any issues during battery replacement

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BSGSWHM2 |
| Antenna Location | Laptop |
| Battery Capacity | 225 Milliamp Hours |
| Battery Cell Type | Lithium Ion |
| Battery Weight | 3 Grams |
| Best Sellers Rank | #89,830 in Electronics ( See Top 100 in Electronics ) #1,324 in Laptop Batteries |
| Brand | Rome Tech |
| Built-In Media | battery |
| Compatible Phone Models | Dell Precision 5510 / Dell Precision 5520 / Dell Precision 5530 / Dell Precision 5540 ? / Dell Latitude 5290 2-in-1 |
| Customer Reviews | 2.8 2.8 out of 5 stars (5) |
| Manufacturer | Rome Tech |
| Model Name | ml1220 |
| Model Number | 22SLIMPNML1220S |
| Number of Batteries | 1 C batteries required. (included) |
| Reusability | Single Use |
| UPC | 712302251898 |
| Unit Count | 1.0 Count |
| Voltage | 3 Volts |
| Warranty Description | 30 Days |

## Product Details

- **Battery Capacity:** 225 Milliamp Hours
- **Battery Cell Composition:** Lithium Ion
- **Brand:** Rome Tech
- **Number of Batteries:** 1 C batteries required. (included)
- **Recommended Uses For Product:** Laptop

## Images

![Rome Tech ML1220 CMOS BIOS Battery for Dell Precision 5510, 5520, 5530, 5540, 5290 2-in-1 - Rechargeable Laptop Backup RTC with 2 Wire Cable - Image 1](https://m.media-amazon.com/images/I/61jTNKfIkVL.jpg)

## Available Options

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

## Customer Reviews

### ⭐ Ordered New, Recieved used instead.
*by W***L on October 14, 2025*

Ordered New, Recieved used instead.

### ⭐⭐⭐ Low voltage
*by S***N on December 6, 2024*

I measured voltage is 2.6 Volts not 3 volts . I returned.

### ⭐ Deceiving. Not 3 Volts battery.
*by L***R on January 6, 2025*

This battery is advertised as a 3 Volts but it only has 2.61 Volts upon arrival. Deceiving. The original battery that I am replacing has 2.6 volts but the laptop has good 5 years or more of use, doesn’t make sense to replace with this supposedly “new” battery and doesn’t make sense why the sellers advertise something as 3 Volts if it only has 2.61 volts. Very disappointing. I don’t recommend.

## Frequently Bought Together

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-04-28*