Quiza y solo quiza esta sea tu situacion
http://www.elotrolado.net/hilo_Expongan-aqui-con-que-Fw-venia-su-slim-con-antipandora_944870
la otra usa el "Open Source Pandora Battery Tool" para crear la bateria pandora
Allows the same options as the original Pandora tool:
service mode writes a serial 0xFFFFFFFF to the battery eeprom (inserting the battery will power on and wait for a proper MS)
auto boot mode writes a serial 0x00000000 to the battery eeprom (inserting the battery will power on and boot the firmware)
dummy normal writes a serial 0x12345678 to the battery eeprom (the battery will work normally)
backup eeprom reads the battery eeprom to a file "eeprom.bin" in the root of a MS
restore eeprom if a file "eeprom.bin" is present, it will attempt to write it to the batteries eeprom
additional option:
Flash only serial from ms0:/eeprom.bin (0x########)
######## is the serial from the dump
will flash only the serial number found in the dump. Best option instead of restoring the entire dump.
With the first byte of a dump being [0], and the serial being 0x12345678 (for hex editing)
[14] = 0x34
[15] = 0x12
[18] = 0x78
[19] = 0x56
May not work with all batteries.
Installation:
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Use whatever method you'd normally use to run homebrew under 3.xx or 2.xx OE/SE/M33 kernels on your PSP.
example:
-put the folder "ospbt_xx" (with eboot and prx) into /PSP/GAME371
-run it from the PSP MS menu.