Due to new customer complaints, HP is expanding its battery recall program with a 78,500 battery batch, and the affected models now include 2018 models such as ProBook 400 G4 and Pavilion x360 (11-inch), ZBook Studio G4, ProBook 430/440/450/455/470 G5, Envy 15 and Mobile Thin Client mt21/22/31.
https://www.notebookcheck.net/HP-is-expanding-its-2018-battery-recall-program.414536.0.html