Should I plugged in charger to laptop when I using it.

I'm amazed that this gets asked so often, and I haven't been able to figure out why. There's no reason and no harm in leaving the battery connected all the time. There's no reason to unplug the AC power once it is full charged. In fact, doing so could potentially shorten the life of your battery if it's recharging from a small usage up to 100% often.

I still don't know why people insist on making this a difficult process, to be honest. If you use the laptop on AC power, great. If you use your battery often, or even occasionally, it's a good idea to drain it down completely every so often, and then recharge it back to 100%. There's no harm in using the laptop on AC power with the battery in the laptop.

oh, I m sorry, I couldn't explain it in better way, because of my bad English.
first of all thanks for reply, ok, I try one more time, in which way the laptop battery will get more life:
1 = plugged in charger all time.
2= using laptop on battery, drain, and then recharge.
??

Neither would be better or worse. I plug my laptop in to AC power whenever I can. Once a month or so, I'll use it on battery to drain it completely, then fully recharge it. If you follow that, whatever goes on in between should be fine.

Just follow those good usage habits, and don't worry about it.

hmmmm, I m following that,, thanks