Tech firm HP is recalling thousands of laptops due to a fault with the battery.
The batteries could overheat "posing a fire and burn hazard to customers", HP has revealed.
Models including ProBooks, some Notebooks and other devices in the ZBook and HP Pavilion range are affected.
HP is urging customers with an affected model to request a replacement battery and download a software update which will switch their battery into 'Safe Mode'.
The devices involved in the recall were all sold between December 2015 and April 2018.
HP issued an alert via its website , it reads: "Many of these batteries are internal to the system, which means they are not customer replaceable. HP is providing battery replacement services by an authorized technician at no cost. HP is also releasing an update to the BIOS to add batteries affected by the program expansion.
"The updated BIOS places the battery in 'Battery Safety Mode' so that the notebook or workstation can be safely used without the battery by connecting to an HP power adaptor.
"Batteries affected by this recall should immediately be put into 'Battery Safety Mode'."
HP's call back is an extension to a recall it issued in January 2018 which involved 50,000 of its devices.
If you have already received a replacement battery you are not affected by this expansion.
The firm is contacting customers directly and will arrange for a replacement battery to be installed.
The laptops with affected batteries include:
- ProBook
- HP Probook 640 G2
- HP ProBook 640 G3
- HP ProBook 645 G2
- HP ProBook 645 G3
- HP ProBook 650 G2
- HP ProBook 650 G3
- HP ProBook 655 G2
- HP ProBook 655 G3
- HP ProBook 430 G4
- HP ProBook 440 G4
- HP ProBook 450 G4
- HP ProBook 455 G4
- HP ProBook 470 G4 - ZBook
- HP ZBook 17 G3
- HP ZBook 17 G4
- HP ZBook Studio G3 - x360
- HP x360 310 G2 - Pavilion
- HP Pavilion x360 - ENVY
- HP ENVY m6 - HP 11
- HP 11 Notebook PC
The following products are compatible but were not shipped with affected batteries. Customers may have purchased a battery as an accessory or received a replacement battery through services that is affected by the recall.
- ProBook
- HP ProBook 430 G5
- HP ProBook 440 G5
- HP ProBook 450 G5
- HP ProBook 455 G5
- HP ProBook 470 G5 - ZBook
- HP ZBook Studio G4 - ENVY
- HP ENVY 15 - Mobile Thin Client
- HP mt20
- HP mt21
- HP mt31
