Pandora’s Battery Not Compatible With PSP Slim
Posted by x3sphere at August 26, 2007, 8:21 pm

According to Chinese website CNGBA, new PSP Slim models have disabled the use of Pandora’s Battery. The tester claims that booting up a PSP Slim with the battery inserted boots to only a black screen and does not read from the memory stick.
All in all, this is not too surprising, considering that Sony had ample time to patch up the battery workaround ever since the first videos surfaced of Chinese shops downgrading PSP units with a battery.

Wasn't all that surprising. Maybe it just needs some modification of the psp slim battery.