yeah i bought a battery i thought was a sony original but it was a fake - the only way to tell was to give it several charge/discharge cycles and then test it against my original battery. my orig battery outperformed the new one by 100%+ as my battery gave me roughly 2.5 hours gaming while the fake gave me 50 mins and no more - and my orig battery is well over 2 YEARS old.
on a side note it also couldnt be converted to pandora but i didnt try that until i had tested the life of the battery - it came up with a single error and that error means the flash was non writeable (the serial number would not change after writing). however i do think sony will stop producing batteries with writeable flash inside to try and combat pandora but the psp has been out for years now and that means theres plenty of batteries around, not to mention other manufacturers (like datel) are still making pandora capable ones.
