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Small round silver lithium coin cell battery for Toshiba Satellite P840

DBTLAP

DBTLAP CMOS Battery Compatible for Toshiba Satellite P840

SKU CH-MBAS-RAMWA

Replacement CMOS battery restores BIOS settings on Satellite P840 laptops

  • Battery typeLithium
  • Direct replacement for Satellite P840 motherboard
  • Lithium chemistry provides stable CMOS power
  • Tested before shipping to ensure reliability
  • Fixes BIOS reset and clock errors
  • Single battery included for immediate install

Compatible CMOS Battery for Satellite P840

This DBTLAP lithium cell replaces the CMOS BIOS RTC battery on a Toshiba Satellite P840 motherboard. It is a dedicated coin-type backup battery, not a main laptop power pack. The part arrives new and tested, ready to restore system clock and BIOS settings when the original cell fails.

Lithium Coin-Cell Interface Limits

The battery connects through the standard two-pin CMOS header found on the motherboard. Voltage and physical dimensions are fixed by that header, so the cell cannot be used in devices requiring a different pinout or form factor. It supplies only the low current needed for real-time clock and CMOS memory retention.

Build Quality and Daily Implications

Each unit is tested before shipping to confirm reliable contact and capacity. The compact coin design fits the existing motherboard holder without modification, allowing a straightforward swap when the system clock drifts or BIOS settings reset. No additional wiring or adapters are required for installation.

How it compares

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

Price $10.99
Typical for this category: the median of 10,440 items is $10.99.

Specifications

Power
Battery typeLithium

Questions about this item

Which DBTLAP CMOS battery fits my Toshiba Satellite P840?

This DBTLAP CMOS battery is listed as compatible for the Toshiba Satellite P840 and is a direct replacement for the original BIOS RTC cell on the motherboard.

What does the lithium chemistry mean for daily use in my laptop?

The lithium cell holds a stable 3 V charge for years, keeping the system clock and BIOS settings alive whenever the main battery is removed or drained.

What connection standard does this CMOS battery use on the motherboard?

It uses the standard two-pin JST-type header found on the Satellite P840 motherboard, so no soldering or adapter is required.

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