1. Turn your Acer AS3003LCi laptop over.
2. Find the laptop battery release button lock for your Acer AS3003LCi laptop.
3. Now that your Acer AS3003LCi 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 Acer AS3003LCi battery is removed, grab your replacement Acer AS3003LCi battery for installation.
6. Insert the battery into the slot. Push the Acer AS3003LCi battery towards the laptop and secure it in place.