1. Turn your Toshiba A105-S2051 laptop over.
2. Find the laptop battery release button lock for your Toshiba A105-S2051 laptop.
3. Now that your Toshiba A105-S2051 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 A105-S2051 battery is removed, grab your replacement Toshiba A105-S2051 battery for installation.
6. Insert the battery into the slot. Push the Toshiba A105-S2051 battery towards the laptop and secure it in place.