myramisericordia :
because somehow i want to use it without battery and plug while using it,
The only way to do that on laptops with non-removable batteries is to physical modify it with a toggle switch on the battery's positive wire connecting it to the motherboard. That's a fairly involved DIY job, and most people who have the skills to do it wouldn't be asking how to do it.
Most laptops with non-removable batteries employ various strategies to avoid the early battery death problems which plagued older laptops. The worst thing you can do to a battery is to charge it to 100%, or discharge it to 0%. Each deep charge/discharge like this reduces the battery's capacity, and after a few years (300-1000 cycles) you have a battery which only lasts 5 minutes.
Some newer laptops have an option which lets you limit the max charge of the battery (usually to 80% or 90%). Once the battery reaches this charge level, it stops charging, thus guaranteeing you never reach 100% charge.
Some laptops do this internally. For example, the battery will be labeled as 48 mAh capacity, but if you use a software tool, Windows will report it is a 43.2 mAh battery - 90% of its actual capacity. In this way, even when Windows reports the battery is 100% charged, it is in reality only 90% charged. And you're avoiding the damaging 100% charge level.
Pretty much all laptops also add some hysteresis to the charge cycle. Li-ion batteries slowly self-discharge when not in use. Many old laptops would immediately top off the battery back to 100% the moment it self-discharged down to 99%. This resulted in repeated charges back to 100% every 30-60 minutes, which rapidly killed the battery (old Toshibas were notorious for this). Nearly all newer laptops will charge the battery to 100%, but won't top the battery off again until its charge level drops to 95% or 90%. On many of these, if you disconnect the AC power (stop the charging) when it reaches 95% or 90%, then plug it back in again, it won't continue to charge up to 100% until it drops below this threshold.
If you use the laptop plugged into AC most of the time and want to preserve the non-removable battery, I would take it off AC at least once a week and let it discharge to about 30%-50%, before putting it back on AC. About once every 1-3 months, do a full discharge to 5% (when Windows will auto-shutdown) then charge it back to 100%. This deep discharge and recharge damages the battery, but is important to allow Windows to recalibrate its battery meter. If Windows loses calibration, you won't know if the % battery it is reporting is still accurate, causing these battery-saving strategies to fail.
The other big killer of batteries is heat.
More reading if you want to know the gory details.
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries