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Small round lithium CMOS battery in plastic wrap

DBTLAP

DBTLAP CMOS battery for Toshiba Portege 3440CT

SKU CH-VH1G-RJ093

Lithium CMOS battery maintains BIOS settings on Portege 3440CT motherboards

  • Battery typeLithium
  • Compatible with Toshiba Portege 3440CT model
  • Lithium chemistry provides reliable CMOS power
  • Replaces faulty or broken RTC battery
  • Tested before shipping for quality assurance
  • New replacement part for motherboard BIOS memory

What this battery is and who it fits

The DBTLAP CMOS battery is a lithium coin cell built to replace the BIOS RTC battery on a Toshiba Portege 3440CT. It restores the real-time clock and CMOS settings when the original cell has drained. Buyers who need a main power pack for the laptop should look elsewhere because this is not a primary laptop battery.

Practical limits of the lithium coin cell

Lithium coin cells deliver a steady low current over years but cannot supply the high current a laptop needs to boot or run. The cell only maintains firmware settings and the system clock while the machine is off or unplugged. If the main battery or AC adapter is missing the laptop will not start from this component alone.

Build quality and daily implications

Each unit is tested before shipping and arrives as a single replacement cell ready to install on the motherboard. The compact lithium form factor slots into the existing holder without extra cables or brackets. Once fitted it requires no maintenance until the voltage eventually drops after several years of continuous time-keeping duty.

How it compares

Measured against everything we stock in Household Batteries & Chargers, at today’s prices. Recalculated every night.

Price $9.99
Cheaper than about 60% of the 10,440 comparable items (median $10.99).

Specifications

Power
Battery typeLithium

Questions about this item

Which CMOS battery version fits the Portege 3440CT?

This DBTLAP lithium cell is built specifically for the Toshiba Portege 3440CT motherboard, so the single version listed is the correct one.

What does the lithium chemistry mean once the battery is installed?

The lithium cell maintains the real-time clock and BIOS settings when the main power is off, keeping date, time and hardware configuration intact.

What interface does the CMOS battery use and what does that limit?

It connects via the standard two-pin motherboard header, limiting use to CMOS RTC backup duty on compatible laptop boards.

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