1. Turn your HP DV1400 laptop over.
2. Find the laptop battery release button lock for your HP DV1400 laptop.
3. Now that your HP DV1400 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 DV1400 battery is removed, grab your replacement HP DV1400 battery for installation.
6. Insert the battery into the slot. Push the HP DV1400 battery towards the laptop and secure it in place.