Size

• The PSP Slim is 33 percent lighter (dropping 99 grams) than the PSP. It is also 19 percent slimmer.
  
  

Wi-Fi

• The Wi-Fi is improved with the switch now located at the top of the PSP Slim with a stronger connection.
  
  

RAM

• Internal memory has been increased to 64 MB on the PSP Slim, allowing for more save data to be stored.
  
  

Battery

• Battery improvements include a new pack and ability for USB charging.
  
  

Video Output

• A new video output allows for connection between the PSP Slim and a television.
  
  

D-Pad

• An all-new directional pad was developed for PSP Slim, likening more to the PlayStation 3's.