HP ProBook 640 Back Panel Replacement

Turn the laptop upside down to show the battery lock slider.

Slide the battery slider all the way to the left, towards the battery symbol.

You may also need to slide the other slider to the right of the battery slider, as shown in the picture.

Remove the battery by sliding it away from the laptop while holding the battery locker.

The battery should slide out with ease.

Slide down and pull up on the cover to remove it.