1. Turn your eMachines G620 laptop over.
2. Find the laptop battery release button lock for your eMachines G620 laptop.
3. Now that your eMachines G620 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 eMachines G620 battery is removed, grab your replacement eMachines G620 battery for installation.
6. Insert the battery into the slot. Push the eMachines G620 battery towards the laptop and secure it in place.