A few years ago, Samsung had major battery issues when several faulty Galaxy Note 7 phones had exploding batteries. The devices were recalled, and the company spent a lot of time over the following years outlining all the rigorous battery tests it did to ensure it didn't happen again. Now, YouTuber Mrwhosetheboss, as well as others, have noticed batteries in Samsung phones are swelling up at a disproportionately high rate. This usually affects older devices, but some are only a couple of years old – the 2020-era Galaxy Z Fold 2, for instance. Samsung hasn't formally responded yet, but battery swelling isn't a new problem, nor one unique to Galaxy phones.