Ignoring the lithium battery issue, and the actual regulations, consider that the checked in baggage will be treated with the same level of care that routinely destroys guitars and suitcases. Maybe you dont want to have your laptops dropped on the tarmac.

Also check with your work, you may have rules that prevent you putting work laptops in checked luggage, as its easiest for them to be stolen from there (or if your really paranoid, easiest for malware to be installed without your knowledge)