Laptop goes off when plugged in

SOURCE: What is the Sony Vaio VGN-N250N battery life expectancy.

nope..that's just what happens with batteries that are older, tired, and dried out..

SOURCE: how long should battery for a sony vaio-ns pc/laptop last?charge?

battery life is always dependent on what "settings" you have for the "power" (the icon of the battery, next to the clock), and also how do you use the system. for example if you use it gaming kiss you battery lasting goodbye, if you use it for business, and like your screen very bright, your battery drains faster, if you are using you laptop and NOT using the wireless (not browsing the internet wirelessly), turn that wireless OFF, and ON when only you need it. BUT typically 2 hours tends to be fair among laptops. (some of them claim to last 8 hours, but again we might be talking mac here).
are u supposed to keep battery plugged in? well, if you are in the office, i would say yes, since u never know when u need to leave and need it on the go.
would you wait until battery is almost drained and then recharge? I would not recommend it. note, if you do, make sure you allow enough time for "warning" before you computer goes to hybernate, or just shut down (settings in the power settings, icon of battery on the bottom right) or from the control panel.
good luck.

SOURCE: My laptop is a Sony Vaio PCG-6Q2M with Power and Battery Problems

fix first the power adapter/ it not charging some problem of your power adpater,, check the charger if it is working properly or not, then follow by dc connector should know that your dc connector has no deffect// if its okay check the motherbaord of your pc maybe som chips need to replace or damage...ic capacitor fause..ech..

SOURCE: sony vaio won't charge new battery

i believe it is a charger issue not a battery issue replace your charger

SOURCE: my sony vaio vgn-cr220e/r battery will not charge

I suggest you buy a new sony vgp-bps9 battery at battery center