A:AnswerBattery life and charge cycles rely on a multitude of different variables and factors. Unfortunately at this time this cannot be easily calculated. Keeping the laptop plugged in is not detrimental to the laptop or to the battery.
A:AnswerThis model shows to be compatible with either the HP Stylus Pen in Silver: https://www.bestbuy.com/site/hp-stylus-pen/5902029.p?skuId=5902029 , or the HP Tilt Stylus Pen in Grey: https://www.bestbuy.com/site/hp-tilt-stylus-pen/6163896.p?skuId=6163896
A:AnswerThe batteries are removable but require some disassembly, this is due to their . If there is an issue with the computer not turning on I would reach out to the HP customer service team or Best Buy Geek Squad.
A:AnswerAny Bluetooth keyboard and mouse will work. Just get one designed for Windows and not MacOS or Android.
As for dongles, depends on what you want to connect. The USB-C port on the laptop is is only data compatible. No Thunderbolt or display output. But should work for anything else.
A:AnswerIt is possible but I do not see it carried at Best Buy. May be a custom order which would make it more expensive than these pre-configured options.