No one able to increase the speed ? snapping a good quality picture ?

that's a weird problem 
what about when u open other apps?
try calibrate ur batery first, it might b ur battery.

play store, search 'calibrate'. after calibration, use ur phone or wait till battery finish, recharge phone to 100% without stopping.

with the best rating ofcourse haha.. idk much about battery calibration but it replace ur old batt stat to a new one. i calibrate whenever i flash to a new rom or firmware.

warranty, yes, i heard only for 6 months. warranty for phone is 1 year.
but, in ur case i think no, refer to this
http://www.samsung.com/my/support/warranty...POLICY.WARRANTY

dunno price for original battery but im guessing about rm100.
fake ones (AA?) are about rm30-rm50. might as well get high capacity rm50-rm70.

welkam, helpful slightly due to boredom   

If u wanna charge till morning, just switch on the wifi. Mine still ok eventhough I charge till morning.

Never believe when they say the baterry (not ori) with extra capacity or whatever. It is just BS.

I bought the ori one from a friend so I got it cheap.

picture and how u know its original ?

From what I read, one can't really overcharge modern smartphone batteries becoz there is circuitry to prevent that. But one must not do is to drain the battery to 0% coz that will damage it.

Playing games while charging have made my original stock battery to "kembung " .Actually the biggest enemy
is overheating our battery .i dont overcharging is a problem as it auto cut off once its full thats why the battery
dont get heated up.

How long is the warranty for SGW ori battery yea? Is it 6 months?

Hope you don't go to outside shop for root service. They will probably root your phone and install something then the price will be random because it's actually free if you do it yourself.
A simple guide to root your phone:
1. Download http://dl.dropbox.com/u/47601401/update.zip and put inside internal memory.
2. Boot into recovery by switching off your phone then turn it on with Power button+ Volume up + Home button. Once samsung logo appeared, release Power button. As soon as you see the Android with the box, release the Home- and Volume Up-button. Then hit the menu button.
3. You will see a menu and navigate up and down with volume up and down buttons. Choose 'apply sdcard:update.zip' and select it with home button. Choose the update.zip in your internal memory.
4. Wait a while and it should be done. Choose reboot system now and you are now rooted. There should be an app call 'superuser'. Don't do anything to it, just leave it there.
Good luck.

To freeze those unnecessary apps, you will need Titanium Backup. Download it from internet as it's a paid app on play store. There is a function call Freeze in Titanium backup.
Here's a list of apps that can be freeze:
Accuweather
Allshare
Buddies Now
Days
Clock
Digital Clock
Dual Clock
Game Hub
Home Screen Tips
Maps
News and Weather
Samsung Apps
SNS
SNS Disclaimer
SNSAccountFB
SNSAccountLi
SNSAccountMS
SNSAccountTW
Social Hub
Swype
Yahoo Finance

And for the memory problem, swapping your internal and external sd would be the best.
Here's again with a simple guide to swapping memory (Only for gingerbread) :
1. Install titanium backup.
2. Backup all User app only...don't backup system apps ! (using titanium backup)
3. Download & Install SwapSD : http://goo.gl/yBms4
4. Open SwapSD press Swap then Reboot.
5. For Unswap just press Default then Reboot.
6. After swap, restore your apps using Titanium backup(restore only USER APPS WITH DATA, NO SYSTEM APPS!)
7. Done
Good luck.