1. Turn your Dell PP29L laptop over.
2. Find the laptop battery release button lock for your Dell PP29L laptop.
3. Now that your Dell PP29L laptop battery is unlocked, find the battery release button down.
4. Holding the laptop battery release button, gently pull your battery away from the laptop.
5. Now that your Dell PP29L battery is removed, grab your replacement Dell PP29L battery for installation.
6. Insert the battery into the slot. Push the Dell PP29L battery towards the laptop and secure it in place.