This repair guide will help to replace the Lenovo Thinkpad Edge E520. This guide will be useful if your device does not power up correctly or has a short battery life.
Close the computer screen.
Flip the computer so that the back is facing upwards.
Slide the switch towards the unlocked lock icon.
While holding it in the unlocked position, slide the battery towards the hinge.
Fully separate the battery pack from the back of the laptop.