Hi, I just realized that my Surface Pro 4 battery is beginning to swell. The screen is bulging in the middle. I contacted MS but their solution was just to purchase another Surface Pro. This machine has a BIOS option to only charge the battery to 50% (when the device is used as a kiosk). So, I set it up only to charge to 50% while I am using it and at the end of the day I unplug it from the docking station and shut it down. I wish I would’ve known about his feature when I bought it from the reseller. I also have a Dell Inspiron laptop that has a battery management tool. Which limits full charging of the battery when the device is always plugged in. So, I’m not sure what to do regarding the SP4. I should start using the Dell and recycle the SP4 to avoid any potential fire hazard. My Mom has a HP Pavilion that is always plugged in but unfortunately HP only provides a battery management tool for business devices but not personal devices which is ridiculous. I told her to occasionally use it in battery power.