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Small round lithium CMOS battery with wire lead, model 900

DBTLAP

DBTLAP CMOS battery for Toshiba Satellite U900

SKU CH-0WB0-EEZSD

Lithium CMOS battery replaces the BIOS RTC cell on Toshiba Satellite U900 motherboards

  • Battery typeLithium
  • Direct-fit replacement for Satellite U900
  • Lithium chemistry keeps BIOS settings alive
  • Single-unit pack installs in minutes
  • Pre-tested cell ships ready to use
  • Restores date and time after power loss

What this product is

This DBTLAP CMOS battery is a direct replacement for the Toshiba Satellite U900 laptop motherboard. It restores the real-time clock and BIOS settings when the original cell no longer holds a charge. The lithium cell is tested before shipping and arrives new in a single-unit package. It is intended for repair technicians or owners servicing this specific model.

Thermals noise and power

The coin cell draws only microampere currents to maintain the RTC and CMOS memory while the laptop is off. It produces no audible noise and generates no perceptible heat during normal operation. Power consumption is negligible and has no impact on the main battery runtime or system thermals. The component is passive and requires no active cooling.

Compatibility constraint

This part fits only the Toshiba Satellite U900 motherboard and will not work in other laptop models or as a main power battery. Buyers who need a primary laptop battery or a CMOS cell for a different machine should look elsewhere. Verify the exact model number before ordering to avoid a mismatch. The package contains one lithium CMOS battery ready for installation.

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

How do I install the CMOS battery in my Toshiba Satellite U900 and what step is often missed?

Disconnect the main battery and power adapter first, then replace the coin cell on the motherboard; the step often missed is clearing the BIOS settings afterwards so the system clock and boot order reset correctly.

What maintenance will this CMOS battery need and when should I replace it?

No routine maintenance is required; replace the lithium coin cell when the system clock loses time, BIOS settings revert to defaults, or the laptop shows a CMOS checksum error on boot.

What is the first limit that appears under sustained use of this CMOS battery?

The lithium chemistry gradually loses capacity over years; the first sign is the real-time clock drifting or BIOS settings resetting after the laptop has been powered off for extended periods.

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