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Small round silver lithium CMOS battery with two wire leads and white connector

DBTLAP

DBTLAP CMOS Battery for MSI MEGABOOK S300

SKU CH-E9M2-2X5NH

A lithium CMOS battery that keeps the MSI Megabook S300 system clock and BIOS settings running

  • Battery TypeLithium
  • Keeps system clock accurate with lithium CMOS cell
  • Direct replacement for MSI MEGABOOK S300 motherboard
  • Pre-tested unit ensures reliable BIOS memory retention
  • Single battery included for straightforward installation
  • New component restores RTC function on laptop board

Compatible CMOS Battery for MSI MEGABOOK S300

This lithium coin cell replaces the CMOS BIOS RTC battery on the MSI MEGABOOK S300 motherboard. It keeps system time and firmware settings when the main power is removed. The part is supplied new and tested before shipping. It is not a main laptop battery and does not power the device during use.

Steady Low-Current Retention Under Continuous Load

The cell delivers the microampere current needed to maintain the real-time clock and CMOS memory indefinitely. Voltage remains stable across the operating temperature range of the laptop chassis. There is no high-drain burst behaviour; the chemistry is optimised for years of continuous, low-level discharge. A depleted cell shows as lost time or cleared BIOS settings.

Solder-Free Drop-In With Standard Connector

The battery arrives with the correct lead and plug for direct motherboard attachment. No soldering, crimping or adapter cables are required. The compact lithium package fits the original battery bay without modifying surrounding components. One unit is included, ready for immediate installation.

Highlights

  • Keeps system clock accurate with lithium CMOS cell
  • Direct replacement for MSI MEGABOOK S300 motherboard
  • Pre-tested unit ensures reliable BIOS memory retention
  • Single battery included for straightforward installation
  • New component restores RTC function on laptop board

Specifications

Battery TypeLithium

Questions about this item

How much power does the DBTLAP CMOS battery draw while the MSI MEGABOOK S300 runs all day?

The lithium CMOS battery only supplies a tiny standby current to keep the real-time clock and BIOS settings alive; it does not draw power from the mains while the laptop is running.

What must I already have in the MSI MEGABOOK S300 for this CMOS battery to work?

You need a compatible motherboard CMOS socket and the existing battery holder that matches the original coin-cell form factor used in the MEGABOOK S300.

Will this replacement CMOS battery keep the BIOS settings on my older MSI MEGABOOK S300 motherboard?

Yes, it is a direct replacement for the original RTC cell, so the motherboard will retain date, time and firmware configuration exactly as before.

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