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Small round lithium CMOS battery with wire lead and connector

DBTLAP

DBTLAP CMOS battery for Dell Inspiron 15-5547

SKU CH-A806-HR5MF

Lithium CMOS battery keeps the system clock and BIOS settings on Dell Inspiron 15-5547 laptops

  • Battery typeLithium
  • Powers BIOS clock and settings with lithium cell
  • Direct replacement for Dell Inspiron 15-5547 motherboard
  • Pre-tested unit arrives ready to install
  • Restores CMOS function after battery failure
  • Single battery supplied for immediate swap

What this battery does

The DBTLAP CMOS battery supplies power to the real-time clock and BIOS memory on a Dell Inspiron 15-5547 motherboard. It keeps system time and firmware settings intact when the main battery is removed or exhausted. This is a motherboard coin cell, not a main laptop power pack.

Lithium chemistry as the deciding spec

The cell uses lithium chemistry, which delivers the stable 3 V output that the RTC circuit expects. A different chemistry would shift the voltage and could prevent the BIOS from retaining its configuration. Verify that the original part is also a lithium coin cell before fitting this replacement.

Behaviour over months of continuous use

Lithium coin cells discharge very slowly, so the voltage remains steady for the multi-year intervals typical of CMOS duty. The battery is tested before shipping to confirm it meets the nominal voltage. It will not sustain a high-current load, but that is never required for the real-time clock function.

How it compares

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

Price $11.99
Pricier than about 55% of the 10,440 comparable items (median $10.99).

Specifications

Power
Battery typeLithium

Questions about this item

How does the CMOS battery keep the BIOS clock and settings alive once it is installed in the Inspiron 15-5547?

The lithium cell supplies continuous low current to the real-time clock and CMOS memory so the system retains time, date and firmware configuration while the main power is off.

What connector standard does this battery use and what does it limit in practice?

It uses the standard two-pin JST-type plug found on Dell motherboards, which limits installation to boards that have the matching header and correct polarity.

What physical space and mounting method does the battery need inside the 15-5547 chassis?

The coin-cell fits into the dedicated motherboard holder and the short lead reaches the nearby header without requiring additional brackets or cable routing.

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