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Small round lithium CMOS battery with two wire leads and a white connector

DBTLAP

DBTLAP CMOS Battery for Dell Inspiron 17R 5720

SKU CH-3396-NG4DV

Lithium CMOS battery keeps system clock and BIOS settings on Dell Inspiron 17R 5720 motherboards

  • Battery TypeLithium
  • Replaces faulty CMOS battery to restore BIOS settings
  • Lithium chemistry provides stable voltage for real-time clock
  • Tested before shipping to ensure reliable operation
  • Designed specifically for Dell Inspiron 17R 5720 motherboard
  • Package includes one replacement CMOS battery unit

Direct Replacement for Inspiron 17R 5720

This CMOS RTC battery restores BIOS clock and settings retention on Dell Inspiron 17R 5720 laptops. It is a lithium cell intended for motherboard use, not the main laptop power pack. The part suits owners whose system loses time or shows CMOS checksum errors at boot.

Simple Swap With Basic Precautions

Installation requires opening the chassis to reach the motherboard socket, so disconnect the main battery and hold the power button to drain residual charge first. The connector is keyed; forcing it risks pin damage. Static discharge can harm the board, so ground yourself before handling the new cell.

Lithium Cell Limits

The lithium chemistry provides stable voltage for real-time clock duties but cannot be recharged by the laptop. Service life varies with temperature and standby duration; a fresh cell typically lasts several years. Once depleted, the system will revert to default BIOS settings on every cold start.

Highlights

  • Replaces faulty CMOS battery to restore BIOS settings
  • Lithium chemistry provides stable voltage for real-time clock
  • Tested before shipping to ensure reliable operation
  • Designed specifically for Dell Inspiron 17R 5720 motherboard
  • Package includes one replacement CMOS battery unit

Specifications

Battery TypeLithium

Questions about this item

How can I confirm the CMOS battery is working after installing it in my Dell Inspiron 17R 5720?

After installation the system clock should keep the correct time and BIOS settings should remain saved when the laptop is powered off and unplugged.

What is included in the package and do I need any extra parts for the Dell Inspiron 17R 5720?

The box contains one CMOS battery. No additional cables or adapters are required for the replacement.

Which version of this CMOS battery should I choose for the Dell Inspiron 17R 5720?

This single lithium CMOS battery is the only version offered and it is compatible with the Dell Inspiron 17R 5720.

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