Whenever I start playing any moderately demanding game, the charging light stops being a steady light and starts blinking rapidly, and the battery begins to drain. Nothing seems to stop this. I attempted to play Baldur's Gate 3, and even with the settings turned down, the battery lasted less than an hour despite being plugged in.
According to what I've found on Google, numerous other people have had this problem, but I haven't had any luck with any fixes. Removing the battery related entries in the device manager and restarting, for instance, didn't help at all. One user I saw was able to fix the problem with a new power cable, but I couldn't find one at any nearby store, and I couldn't get in touch with Acer support (and, since I bought this open box, I don't think I'm covered by warranty anyway). I'm also currently studying abroad, so taking it into a repair shop is going to be difficult-to-impossible due to the language barrier.
Is there anything I can do to fix this?