Another battery tip from cool knex13 this one is for PSP.

Hope it helps and do not forget to rate and comment.

Come back again and I might have added new tips!

Step 1: Brightness

This can really suck your battery.
Turn the brightness on the lowest it can go.
Low
Medium
high
these are the three stages.

Step 2: Headphones

Use headphones more often

(Sorry did not have much information on this one!)

Step 3: UMD

Take the UMD out when you are not using it because every time you go past the "games" folder it will fire up the disk.

Step 4: WLAN

Putting the WLAN to power save really helps to save battery when you are outline.
Go to
Settings > power save settings > WLAN power save > turn on.

Step 5: Auto Sleep

Auto sleep is very useful when you forget to turn your PSP off.
Go to
Settings > Power save settings > Auto sleep > 5 minutes (Recommend).

Step 6: Back Light Auto-off

This is good for when you are listing to music the screen just tuns off.
Go to
Settings > Power save settings > Backlight auto-off > 2 minutes (recommend).

TIP!
Hold the screen button to turn off the screen. (This dose not shut down the PSP)
Press any button to get the screen on.