1. Turn your Sony VGN-A115M laptop over.
2. Find the laptop battery release button lock for your Sony VGN-A115M laptop.
3. Now that your Sony VGN-A115M 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 Sony VGN-A115M battery is removed, grab your replacement Sony VGN-A115M battery for installation.
6. Insert the battery into the slot. Push the Sony VGN-A115M battery towards the laptop and secure it in place.