Dell Precision T3500 (Early 2009) - Manual (Page 13)

Battery
Dell Precision™ T3500 Service Manual
Removing the Battery
1. Follow the procedures in Before Working Inside Your Computer .
2. Remove the computer cover .
3. Lift the hard drive tray .
2. Use a small screw driver or a scribe to push the coin-cell release tab.
3. Remove the coin-cell battery from the computer.
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
NOTE: The memory module shroud has been removed to increase visibility to the following procedure.