1. Turn your Toshiba U405-S2854 laptop over.
2. Find the laptop battery release button lock for your Toshiba U405-S2854 laptop.
3. Now that your Toshiba U405-S2854 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 U405-S2854 battery is removed, grab your replacement Toshiba U405-S2854 battery for installation.
6. Insert the battery into the slot. Push the Toshiba U405-S2854 battery towards the laptop and secure it in place.