Removing the batteryWARNING: Before working inside your computer, read the safety information that shipped with your computer and follow thesteps in Before working inside your computer. After working inside your computer, follow the instructions in After working insideyour computer. For more safety best practices, see the Regulatory Compliance home page at www.dell.com/regulatory_compliance.Lithium-ion battery precautionsCAUTION:• Exercise caution when handling Lithium-ion batteries.• Discharge the battery as much as possible before removing it from the system. This can be done by disconnecting the AC adapterfrom the system to allow the battery to drain.• Do not crush, drop, mutilate, or penetrate the battery with foreign objects.• Do not expose the battery to high temperatures, or disassemble battery packs and cells.• Do not apply pressure to the surface of the battery.• Do not bend the battery.• Do not use tools of any kind to pry on or against the battery.• If a battery gets stuck in a device as a result of swelling, do not try to free it as puncturing, bending, or crushing a Lithium-ionbattery can be dangerous. In such an instance, the entire system should be replaced. Contact https://www.dell.com/support forassistance and further instructions.• Always purchase genuine batteries from https://www.dell.com or authorized Dell partners and re-sellers.PrerequisitesRemove the base cover.Procedure1 Ensure that the battery cable is disconnected from the system board.820 Removing the battery