after reading this...quickly i remove the batt...

is dat posible i buy new battery for my laptop..but hav long lasting life..3hour++

let me put it this way:

you plug in your battery during DC supply, there is slight probability that your battery lifespan will decreasing by time.

you unplug your battery during DC, your battery lifespan might be a little longer, but you will face a risk of mobo damage due to sudden ceased of power supply.

which one do you prefer?

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i understand..
dat y i asking..
is dat posible for me to buy new battery(spare in case of emergency) but the battery hav long lasting life 3hr +++

do u mean hibernating???

nope it wont