No, you need the battery or there'll be nothing to charge the laptop with! Yes, i can run my laptop without battery and just plug the adapter. And i do so for a month until recently got a new battery. and it's cheap and runs well. Here is where i bought it (related links).
Well to make a laptop run/do stuff on yes. When the laptop is plugged in, it is taking in 75% of enegry but then the other 25% goes to the battery where it is stored for if you don't have the plug, then it will use the enegry from the battery.
It depends on the type of laptop you have.
yes you can but it is bad for it even if you use a dead battery it is better than no battery at all
When I plug in my laptop, it does not use the battery to run the computer. Instead, it uses the wall outlet to run the computer and to recharge the battery. So, by leaving my battery in my laptop when it is plugged in, I am recharging my battery and not running it down. If you take the battery out of your laptop and do not recharge it, it will not last long. The computer batteries that I know about can go from 2 to 8 hours without being recharged.
Your battery may be worn out. When you use electricity to run the laptop your battery should not be in your laptop. The power will run through the battery making it drain. Either replace your battery, or take it to get it check out if it is still under warrenty.
Battery run-time on a laptop is difficult to determine. Actual battery running time depends upon the power demands made by the equipment. The use of the screen, the hard drive and other accessories results in an additional drain upon the battery, effectively reducing its running time. The total run-time of the laptop battery is also dependent upon the design of the equipment. Generally, a new Hi-Capacity laptop battery will run 30% to 50% longer than the old laptop battery did when it was new.
You need to buy a new battery look up which battery works with your laptop and buy it online
You need a new battery. They do wear out. The laptop needs electricity to run, either with the electrical cord or with the battery. You cannot "trick" it into thinking it is plugged in any more than you can "trick" a car into running without gasoline or a T.V. into running without electricity.
A vehicle may not run if the battery cables are disconnected with or without a bad alternator. The best way to test an alternator is by voltage output when applying a load.
Run the battery calibrator
Of course laptop can run with a battery as long as the battery is in good condition. If you battery have some problem with charge, you may need to buy another one. And you may shop here, i bough one recently, and it runs quite fair.