I've got a Toshiba laptop that I use for university, so basically it's stationary 95% of the time - yesterday I first noticed that my laptop battery seems to be dying (despite my computer not being so old) and if I recall correctly my warranty is up.
Basically, what I'm trying to ask is: is it ok to have the laptop always plugged into a power source? Will it do harm to my computer? Do I even need to replace my battery?
You might have to buy a new battery if you keep having these problems. But always keeping a battery plugged in might not be healthy for it. When its fully charged try to unplug it.
Buying a new battery isn't on the budget So I guess it's ok to just keep using it as normal? Charging it to the max (100%) and then charging it again when it's low (around 5-10% ?)
...sorry for the stupid question, but I'm a complete non-technical person
Yeah should be fine, it is just telling you that due to the state of your battery that it might turn off all of a sudden. When connected to the power however you will be fine.