They removed the Battery Management System from the battery and wired it up to power as an alternative to soldering directly to the small phone board. Turns out this phone also needs usb charging at the same time because otherwise it assumes the battery is dying even if it's not?
If anyone else is curious, they documented it here:
https://old.reddit.com/r/selfhosted/comments/1h7z9js/what_do_you_think_about_my_new_home_server/
Based on the
flag{it looks part of a CTF. Removing the "-":4e6f5fetc. is hex encoded:No_Aguantaste_El_Tirónu0041u0063u00e1as UTF-16BE isAcá_Te_Doblamos_En_CortoLQFbase32 decoded isYaTeCayoLaBandaDeUHF202020would be a bunch of spaces.I used cyberchef. The magic function figured out the base32 one, but the rest are recognizable.