1. Turn your eMachines eM250 laptop over.
2. Find the laptop battery release button lock for your eMachines eM250 laptop.
3. Now that your eMachines eM250 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 eM250 battery is removed, grab your replacement eMachines eM250 battery for installation.
6. Insert the battery into the slot. Push the eMachines eM250 battery towards the laptop and secure it in place.