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Small round lithium CMOS battery with wire lead and connector

DBTLAP

DBTLAP CMOS Battery for Fujitsu LifeBook T4220

SKU CH-K8CJ-9RHSS

Keeps BIOS settings and system clock running on Fujitsu LifeBook T4220 motherboards

  • Battery TypeLithium
  • Compatible with Fujitsu LifeBook T4220
  • Lithium cell maintains BIOS settings reliably
  • Direct CMOS RTC replacement part
  • Pre-tested before dispatch for quality
  • Single battery included in package

Compatible CMOS battery for LifeBook T4220

This lithium coin cell replaces the original CMOS RTC battery in Fujitsu LifeBook T4220 tablet PCs. It restores BIOS settings and system clock retention when the factory cell is exhausted. The part is intended for motherboard-level replacement, not for the main laptop battery. Builders or technicians servicing this specific model will find it a direct fit.

Tested cell with stable voltage output

Each unit is checked before dispatch to confirm reliable voltage delivery. Lithium chemistry provides low self-discharge and consistent power draw for real-time clock circuitry. Normal operation produces no audible noise and negligible heat. The component draws only microampere current, so it imposes no measurable load on the motherboard power rails.

Single battery supplied ready to install

The package contains one CMOS battery without additional cables, brackets or software. No drivers or configuration utilities are required; installation is a simple swap on the motherboard. Buyers who need a multi-pack, a main system battery, or compatibility with other Fujitsu models must source those separately.

Highlights

  • Compatible with Fujitsu LifeBook T4220
  • Lithium cell maintains BIOS settings reliably
  • Direct CMOS RTC replacement part
  • Pre-tested before dispatch for quality
  • Single battery included in package

Specifications

Battery TypeLithium

Questions about this item

How do I fit the CMOS battery into the Fujitsu LifeBook T4220, and what step do people often miss?

Open the chassis, locate the coin-cell socket on the motherboard, remove the old cell, and insert the new one with the positive side facing up; the step most people miss is reconnecting the two-pin lead before reassembling the laptop.

What maintenance or replacement will this CMOS battery need later?

The lithium coin cell typically lasts several years; when the system clock starts losing time or BIOS settings reset, simply swap in another identical CR-type cell.

What limit appears first under sustained use?

The cell’s own shelf-life and gradual voltage drop are the first limits; once voltage falls too low the real-time clock stops keeping accurate time.

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