The HP CI03048XL-PR is a three-cell lithium-ion battery for compatible HP notebooks, intended to replace the corresponding battery in supported models. HP service documentation lists it as spare part 801554-001.
With a rated capacity of 4.21 Ah and 48 Wh of energy, it provides the battery capacity specified for these notebooks. The service guide names the HP ProBook 640 G2, 645 G2, 650 G2 and 655 G2 families, helping you check whether this replacement matches your model.
It is a removable service component, and the guide includes removal and replacement steps.