1. Turn your Toshiba P305-S89151 laptop over.
2. Find the laptop battery release button lock for your Toshiba P305-S89151 laptop.
3. Now that your Toshiba P305-S89151 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 Toshiba P305-S89151 battery is removed, grab your replacement Toshiba P305-S89151 battery for installation.
6. Insert the battery into the slot. Push the Toshiba P305-S89151 battery towards the laptop and secure it in place.