Skip to content

SONY PlayStation Portable

  • Model: PSP Slim (PSP-2004)
  • Battery: PSP-S110

Please note that these things only work for PSP-1xxx and PSP-2xxx with a date code (found behind battery!) of 8B or less. If you have a newer PSP or a PSP-3xxx, you will most likely have a TA-88v3 mainboard and destroy it by trying the things described here.

PSP-S110 Pandora Battery

The original shipped battery of type PSP-S110 can be made a Pandora-battery which enables developer features on the PSP.

Opening the battery

The housing of the battery is glued together around the side. DO NOT TRY TO OPEN IT WITH A SCREWDRIVER as you can easily produce shorts which may even make the battery explode or destroy it forever.

The best way is to use your fingernails and a stronger guitar pick (or something else non-conducting material).

After opening, it will look like this:

Now carefully bend over the PCB.

Identify target

Identify the small 8-pin IC with the label S93C56 near the IC04 printed on the PCB - this is an EEPROM which holds information about the battery. We want to stop it sending that information to the PSP.

Looking at a data sheet, we will find this picture:

Now there are 2 ways to interfere: We can disconnect the CS pin which indicates when a new command is about to be sent to the IC or we can short the DO (data output) pin to Vcc so that there will be no readable output from the IC.

If you regularly need a Pandora battery, you can even solder a switch instead of cutting/shorting the points.

Disconnect CS

The CS line is used to tell the EEPROM when it has to listen for commands. By cutting this line, the EEPROM won't be able to work anymore and thus you will have a Pandora battery. If you do it right, then you can undo the cut with a normal pencil (the lead in the pencil is conductive).

Find the line with the 19 printed nearby. It is the one going from the top right pin of the IC. Use a razor knife to cut it at this point (marked red):

That was it! Just assemble everything back and use some adhesive tape to hold the battery together. If you put it into your PSP (with AC adaptor unplugged), the green Power-LED should automatically turn on without doing anything else.

Congratulations. You now have a Pandora battery.

If you want to make it a normal battery later, use a lead pencil and draw along the cut a few times. Check that the PSP doesn't turn on when inserting the battery. If everything works as you want, you can also glue the battery together again.

Short DO and VCC

Magic MemoryStick

A Magic MemoryStick contains a special boot-code which provides means to update the firmware of the PSP. There are different tools to create one:

These are all mostly self-explanatory.

After some playing around with my 120MB MemoryStick Duo without luck, I came to the conclusion, that you really need a Pro Duo for this thing to work. The limit for sticks up to 2GB is gone. You can use any stick - mine was a 8GB MemoryStick Pro Duo Mark 2. Be sure to backup all files first.

Using PSPGrader and Rain's UltraLite MMS Maker didn't work in the first place (tried both with the Format MemoryStick option). The latter one gave the "IPL failed to inject" error. I then used the mspformat.exe from the TotalNewbi Installer to format the USB stick. After that, using Rain's (without the Format option checked) finally worked and I had a Magic MemoryStick.

Using the Magic MemoryStick

To make the PSP load the custom file from the MemoryStick, you have two options:

  1. without the MemoryStick in the slot and without AC adapter plugged, put the Pandora battery into
  2. the green Power-LED should turn on, anything other stays off
  3. hold the L shoulder button while inserting the MMS
  4. now the WIFI- and M-LEDs should flicker and boot the file

you can also do it the other way around:

  1. without AC adapter plugged and without battery inserted, put the MMS into the slot
  2. hold the L shoulder button while inserting the Pandora battery
  3. the green Power-LED should turn on and the WLAN- and M-LEDs should start to flicker

If only the green Power-LED comes on with none of the other LEDs flickering, your Magic MemoryStick mostly doesn't work. In some rare cases you might have a PSP with the newer mainboard (TA-88v3). Find out here. You might also try this.

Flashing custom firmware

After using the MMS and selecting the first option Flash install 5.00M33-4, you will have Dark Alex's firmware on your PSP. Upgrade it to the latest version by following the steps here. Just download the 5.00 M33-5, install it as described there then do the same with the 5.00 M33-6.

Now you have the choice of switching over to Team GEN's firmware which should support all the latest games. To do this, use the XGen Updater as described here. The firmware file is also available here. Newer versions can then be found in the Downloads section of

ATTENTION! If you have problems with corrupted savegames or UMD titles not starting, please use the 5.50GEN-D2 Quick Updater to downgrade to that version until 5.50GEN-D4 is out. You might also try these steps before doing the downgrade.

If you don't have a backup of your saves, try this to possibly recover them.

Backup your games

After you made a backup, copy the resulting ISO file into a folder ISO on your PSP's MemoryStick. It will then appear in the game menu under MemoryStick.

Homebrew Apps



No Trackbacks


Display comments as Linear | Threaded

No comments

Add Comment

Markdown format allowed
E-Mail addresses will not be displayed and will only be used for E-Mail notifications.

To prevent automated Bots from commentspamming, please enter the string you see in the image below in the appropriate input box. Your comment will only be submitted if the strings match. Please ensure that your browser supports and accepts cookies, or your comment cannot be verified correctly.

Form options