Replacing the Coin-Cell Battery | 39Replacing the Coin-Cell BatteryWARNING: Before working inside your computer, read the safety informationthat shipped with your computer and follow the steps in "Before You Begin" onpage 7. After working inside your computer, follow the instructions in "AfterWorking Inside Your Computer" on page 9. For additional safety bestpractices information, see the Regulatory Compliance Homepage atdell.com/regulatory_compliance.WARNING: The battery may explode if installed incorrectly. Replace the batteryonly with the same or equivalent type. Discard used batteries according to themanufacturer’s instructions.ProcedureWith the positive-side facing up, snap the coin-cell battery into the battery socket on thesystem board.Postrequisites1 Replace the system board. See "Replacing the System Board" on page 36.2 Replace the wireless mini-card. See "Replacing the Wireless Mini-Card" on page 30.3 Replace the palm rest. See "Replacing the Palm Rest" on page 27.4 Replace the keyboard. See "Replacing the Keyboard" on page 23.5 Follow step 4 to step 5 in "Replacing the Optical-Drive Assembly" on page 17.6 Follow step 3 to step 5 in "Replacing the Hard-Drive Assembly" on page 20.7 Follow step 3 and step 4 in "Replacing the Memory Module(s)" on page 14.8 Replace the battery. See "Replacing the Battery" on page 11.