My old phone's battery was shot, so I tried the 'freeze it' trick from a forum and it actually worked for a month.
It was a Galaxy S9 I'd had since 2020. The battery would die at 40%, and a replacement quote was $90. I was about to recycle it when I saw this wild suggestion on a tech board: fully drain the phone, seal it in a ziplock, put it in the freezer for 3 hours, then let it warm up completely before charging. Sounded like total nonsense, but I had nothing to lose. Did it on a Tuesday night. For the next four weeks, the battery acted almost normal, holding a charge down to about 10% before shutting off. It bought me enough time to properly shop for a new phone without panic. Obviously it's not a fix, and the battery finally gave out for good last week, but it was a surprisingly effective temporary hack. Has anyone else tried a bizarre 'fix' like this that actually bought you some time with a dying gadget?