Samsung users encounter steep battery drain following the One UI 9 upgrade

Samsung has rolled out its Android 17-based One UI 9 update to the Galaxy S25 and Galaxy S24 series, but some owners are seeing drastic hits to battery life. Across online forums and social media, several users describe fast-draining batteries, including a Galaxy S24 Ultra that lost 95 percent of its charge in just over five hours with roughly three hours of screen-on time. Others with Galaxy S25 handsets note having to recharge three to four times a day. [1][2][3]

The issues appear tied to both active and passive usage. One Reddit post documented a phone shedding 40 percent of its capacity across 11 hours while sitting idle. In addition to power drops, at least one user in South Korea encountered an error loop during initial setup that prevented access to the home screen until browser settings and network connections were adjusted. [1][2]

The problem does not appear universal, with outlets observing normal battery behavior on their own hardware. While Samsung has reached out directly to at least one user to schedule a service visit, it has not yet issued a general software patch for the drain. For now, suggested remedies remain limited to standard fixes like rebooting, halting errant applications, or performing a factory reset. [1][2][3]