HP ProBook 650 G2 Battery Replacement

There are 8 case screws that all use a PH1 bit

Start at the back near the hinge with a pry tool

Work your way around to the front using enough pressure to release the plastic clips

Once you get near the opposite corner it should release to a point where you can use your hand to pull it open

There are 7 captive screws (on the original HP battery) around the edge of the battery that use a PH1 bit

Once the screws are removed you can use the tab nearest the front center of the laptop to lift the battery up and out

If your new battery did not come with the captive screws you can unscrew them from the old battery by applying pressure under the screw while unscrewing them so you can transfer them to the new battery