1. Turn your Gateway B1945040G00001 laptop over.
2. Find the laptop battery release button lock for your Gateway B1945040G00001 laptop.
3. Now that your Gateway B1945040G00001 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 Gateway B1945040G00001 battery is removed, grab your replacement Gateway B1945040G00001 battery for installation.
6. Insert the battery into the slot. Push the Gateway B1945040G00001 battery towards the laptop and secure it in place.