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Small silver coin cell CMOS battery for Toshiba Portege 3440

DBTLAP

DBTLAP CMOS battery for Toshiba Portege 3440

SKU CH-HFNP-FCN2V

Lithium CMOS battery keeps the BIOS clock and settings on Portege 3440 motherboards

  • Battery TypeLithium
  • Lithium chemistry provides stable BIOS timekeeping
  • Direct fit for Toshiba Portege 3440 motherboards
  • Replaces faulty or cracked CMOS cells
  • Pre-tested unit ensures reliable start-up
  • Single battery included for quick swap

Targeted Replacement for Portege 3440

This CMOS battery is built specifically for the Toshiba Portege 3440 laptop motherboard. It restores the real-time clock and BIOS settings when the original cell fails. The lithium chemistry provides the steady low current required for CMOS memory retention. Installers should verify the exact connector orientation before fitting.

Long-Term Voltage Stability

Lithium cells hold a consistent voltage across years of continuous trickle draw rather than spiking and sagging like alkaline alternatives. The battery is tested before shipping to confirm it meets the nominal voltage window. This steady output prevents checksum errors and date resets during extended periods where the main battery is removed or depleted. Day-to-day the machine keeps accurate time without intervention.

Compact Form Factor for Motherboard Mounting

The unit arrives as a single cell with its original lead and connector attached, ready to plug into the designated header on the Portege 3440 board. No soldering or adapter cables are required, reducing the risk of cold joints or reversed polarity. The small footprint fits the factory battery cavity without forcing adjacent components. Builders who need a multi-cell pack or a different voltage should source an alternative part.

Highlights

  • Lithium chemistry provides stable BIOS timekeeping
  • Direct fit for Toshiba Portege 3440 motherboards
  • Replaces faulty or cracked CMOS cells
  • Pre-tested unit ensures reliable start-up
  • Single battery included for quick swap

Specifications

Battery TypeLithium

Questions about this item

Does the CMOS battery draw noticeable power or generate heat while the Portege 3440 runs all day?

The lithium CMOS battery only powers the real-time clock when the laptop is off, so it adds no measurable heat or power draw during daily use.

What must already be present in the Portege 3440 for this DBTLAP CMOS battery to work?

The motherboard needs its original two-pin CMOS header and the small retaining clip that holds the coin-cell in place.

Will this replacement CMOS battery keep the Portege 3440 compatible with older peripherals I still use?

The CMOS battery only maintains BIOS settings and the system clock; it does not affect peripheral compatibility.

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