Dell Desktop or Workstation Storage Procedure and Effects on the CMOS Battery Life

Summary: This article discusses the effects on CMOS batteries based on storage conditions, and the length of time left unboxed or not plugged into AC Power.

This article applies to This article does not apply to This article is not tied to any specific product. Not all product versions are identified in this article.
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Symptoms

You may experience that the BIOS defaults have been restored, the Time and Date has not been set message during power-up due to the CMOS battery depletion.

Cause

AC Power retains the computers standby power to reduce the power consumption of the CMOS batteries. If left without a power connection, the battery can deplete and lower the overall expected lifespan.

Expected Storage Environment and Shelf Life for Unused Batteries:

  • The computer should be stored in an environment with a temperature between -40 °C to 65 °C (-40 °F to 149 °F) and relative humidity of 5% to 95% (non-condensing). Under these conditions, the battery can meet the specification requirements within one year of storage.
  • Computers should be stored away from heat sources, direct sunlight, and moisture. It is also recommended that devices be stored far from sources of static electricity.

Resolution

CMOS Battery Life

The battery has a shelf life of one year. To ensure good performance, it is recommended to use the battery within one year. If the storage time exceeds one year under standard storage conditions, it is possible that the CMOS battery depletes and not be able to retain the CMOS settings. Sometimes the CMOS battery may need to be replaced.

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Affected Products

Alienware, Inspiron, OptiPlex, Vostro, XPS, G Series, Fixed Workstations
Article Properties
Article Number: 000228029
Article Type: Solution
Last Modified: 24 Jul 2025
Version:  2
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