1. Turn your HP tx2513cl laptop over.
2. Find the laptop battery release button lock for your HP tx2513cl laptop.
3. Now that your HP tx2513cl 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 HP tx2513cl battery is removed, grab your replacement HP tx2513cl battery for installation.
6. Insert the battery into the slot. Push the HP tx2513cl battery towards the laptop and secure it in place.