To Install the Battery Pack: 1. Turn Power switch to the Off position. 2. Be sure dust bin is empty, then place vacuum cleaner upside down(with cleaning brushes showing) on a flat surface. 3. Guide the Battery Pack into the battery compartment using your index fingers(as shown). The Battery Pack will click into place when properly seated in vacuum cleaner. To Remove the Battery Pack: 1. Repeat Steps 1 & 2 from above. 2. Place your index fingers under the guide tabs on the Battery Pack, then pull upward to release the Battery Pack.