If you look at it on the long term, yes it does in a way ruin the battery of any electronic device. This is because you sort of get it used to the all-time supply of current and the batterry itself doesn't do much work. It is often good to unplug the device and actually use the battery.
No, almost all laptops 1997 and up have protection against overcharging the battery.
yes
no
if you boost charge a battery you should discinnect it from the car. if not you may burn out the alternator
nope. you might have to clean the terminals to the battery with a wire brush, but it doesn't hurt the car at all.
This can reduce the life of the power adapter.The main problem with leaving the adaptor plugged into a laptop and power is it can shorten the battery life.This is especially true if your laptop has a Ni Cad battery.When you require the battery for 1 to 2 hours, it may only give you less than 15 minutes.While Lithium batteries are less prone to these problems, their life can still be reduced.If the laptop is going to be plugged in for extended periods of time, remove the battery.Once a month disconnect the laptop from the power and place the battery back into it.Run the laptop on the battery until you get a warning low battery beep.Connect the power back up to the laptop and let it charge overnight.Remove the battery the next day and leave it out until the next month or until you need to use your laptop without a power connection - whichever comes first.Follow this procedure and your battery should last 3 to 5 years.If you do not and leave your laptop connected to the power continuously, your battery will likely last 2 to 3 years at the most.Sources: General Knowledge
It will probably keep transmitting and place a small drain on the battery.
Using an 18 volt charger for a 14 volt battery can potentially overcharge the battery, causing damage and reducing its lifespan. It is best to use a charger that matches the voltage requirements of the battery to ensure safe and efficient charging.
It is wise to let batteries - whether in a cell phone or laptop - to run all the way down from time to time. Continuously charging your phone or computer can cause batteries to swell and lose their ability to hold a charge for long periods of time.
if you are off work and leaving and get hurt is that workers comp
May be not
It will not hurt it in the least.