Developer khubik and a bunch of other hackers on PSPx.Ru have just released Baryon Sweeper, a tool that finally makes a Pandora-like process possible on most (possibly all in the near future) PSP's.
https://wololo.net/2021/01/12/psp-re...battery-style/
https://wololo.net/2021/01/12/psp-re...battery-style/