1. as usual, avoid setups such as vibrating sensors, bright lcd reso, sound on typing or dialing...it can help it saving more power.

2. install apk as below from android market:

a) Advanced Task Killer Free (by Rechild)
- go to settings > auto kill level (aggresive), auto fill frequency (every half hour).

b) JuiceDefender Free (by latedroid)

3. download and put the apk below in ur sdcard and install them via apk installer or equivalent apps:

a) http://min.us/mbaEHmFtgs
- it will overwrite juicedefender. upon installation, set it to 'advance', then alter whatever setting u want then by sliding left or right of the page. mainly, wifi signal is the main contribution towards power drain. there is a function to close wifi signal when screen is off or something like that.

b) http://min.us/mFUodCrtA
- this is the app that will serve more or less like v6 supercharger, but in a friendly interface. please grant su. upon installation, u can set the scaling with preference to ur need. it comes in default with 'ondemand', im using 'interative'. fyi, the more saving it goes, the more lagness u encounter. the worse of lagness in 'powersave' is that u get lagness with typing an sms. the button goes first then the word pops out later. venture the app urself~

4. best to restart ur phone after providing the new settings in ur apps. enjoy.

add-ons: remember to grant all apps above is su, then remember to put them in the non-kill list of 'advanced task killer' as well.

disclaimer: none above involve h@acking or pirat3d wares. if u are not happy with the app, just remove it from ur phone.i got it from my phone's 2nd market app (not black market). at ur own risk and siuyi takes no acknowledgements.