1. Turn your Gateway T-1409J laptop over.
2. Find the laptop battery release button lock for your Gateway T-1409J laptop.
3. Now that your Gateway T-1409J 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 T-1409J battery is removed, grab your replacement Gateway T-1409J battery for installation.
6. Insert the battery into the slot. Push the Gateway T-1409J battery towards the laptop and secure it in place.