Use this guide to remove, replace, or install the battery of your Toshiba laptop.
Power off the laptop.
Flip the laptop over and orient it such that the battery faces towards you and the front faces away from you as shown in the diagram.
Unlock the battery by sliding the tab shown to the right
Slide the tab shown to the left and remain holding it.
Place your thumb on the grips of the battery as shown.
While holding onto the grips, pull the battery towards you and away from the laptop.