---
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: "RM73"
currency: MYR
in_stock: true
reviews_count: 3
category: "Rome Tech"
url: https://www.desertcart.com.my/products/523926684-rome-tech-ml1220-cmos-bios-battery-for-dell-precision-5510
store_origin: MY
region: Malaysia
---

# 2.6–2.8V initial voltage, recharges to 3.0V Rechargeable RTC backup 2-wire cable for easy plug & play 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:** RM73
**Availability:** ✅ In Stock

## Summary

> 🔋 Power your precision with a battery that keeps up!

## 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?** RM73 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.my](https://www.desertcart.com.my/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

- • **Quick 10-Minute Swap:** Simple installation with 2-pin connector saves your valuable time
- • **Compact & Lightweight:** Slim design (0.634 oz) fits seamlessly without bulk
- • **Effortless Compatibility:** Perfectly fits Dell Precision 5510-5540 & Latitude 5290 2-in-1 models
- • **Long-lasting Reliability:** Premium heat shrink ensures extended CMOS battery life
- • **Smart Recharge Technology:** Automatically recharges from 2.6V to optimal 3.0V after installation

## Overview

The Rome Tech ML1220 CMOS BIOS Battery is a rechargeable RTC backup designed specifically for Dell Precision 5510, 5520, 5530, 5540, and Latitude 5290 2-in-1 laptops. Featuring a compact 2-wire cable design, it installs quickly and recharges from 2.6–2.8V to a stable 3.0V, ensuring reliable BIOS power and extended lifespan with premium heat shrink protection.

## 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 |
| Batteries | 1 C batteries required. (included) |
| Best Sellers Rank | #72,845 in Electronics ( See Top 100 in Electronics ) #1,069 in Laptop Batteries |
| Customer Reviews | 2.8 2.8 out of 5 stars (5) |
| Date First Available | January 17, 2023 |
| Item Weight | 0.634 ounces |
| Item model number | 22SLIMPNML1220S |
| Manufacturer | Rome Tech |
| Package Dimensions | 5.39 x 4.21 x 0.28 inches |

## 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)

## 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 Malaysia*
*Store origin: MY*
*Last updated: 2026-03-20*