Problem/backgroundPhilips have received reports of lithium ion batteries overheating and igniting when they exceed 300 charge/discharge cycles or when battery capacity fell below 80% that of a new battery. The device can display actual information on the battery state of health and charge-discharge cycles. However, the existing labelling does not include full instructions on how to use this information to determine when to replace the battery.A previous medical device alert MDA/2018/0031 was published for the same issue in Philips Suresigns VS and VM patient monitors and viewing stations manufactured before the 03 May 2018. If you have these devices, please ensure that the actions described in that MDA have been completed.