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).
the battery charger and the charger are the same thing. the charger charges the battery and the laptop runs off the power from the battery. hope this helps
You need to buy a new battery look up which battery works with your laptop and buy it online
Sorry, but that is not likely to work. Both the voltage and amperage provided by a charger for a laptop battery will not be correct for a car battery. It is likely that you will damage the charger.
pluged into my laptop where else would it be?
No
1. battery is bad 2. charger is bad 3. charger outlet is powered off by light switch
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 shouldn't - the laptop should be fitted with circuitry to stop charging the battery once it's full. That way, the battery cannot be overcharged. If you're always using the laptop at home (or near a mains socket) - you can simply remove the battery, and just run it off the mains.
A battery operated laptop will normally be supplied with a battery fitted and this battery will be charged/recharged while the laptop is plugged into the mains. In other words the charger is in the laptop.
you must use a battery charger that contain a USB port and connect it to the laptop's USB port
No, it will not harm the laptop to remove the battery and plug it in if it will run that way.
Your question is confusing. First off a battery charger puts out DC voltage not AC. If you are asking if you can run a 120 volt battery charger on a 220 volt circuit the answer is no you cannot. That would destroy the charger.