The Galaxy S25 Ultra launched at Samsung’s Unpacked event on January 22, 2025, and hit shelves on February 3, priced from roughly ₹1,29,999 in India for the base configuration. Eighteen months on, enough owners have logged enough hours on it that a real pattern has emerged in forums and community threads — and it’s messier than either “great phone” or “bad battery” alone would suggest.
The short version: software update delivery has been solid, with Samsung’s promised 7-year support window tracking close to schedule so far. Battery experiences are the more divided story — plenty of owners report unremarkable, solid all-day battery life after a year, while a separate, vocal cluster reports sudden drain and heat issues that appear tied to specific software updates rather than the hardware itself.
None of what follows is a personal test — it’s a synthesis of what’s publicly reported across Samsung’s own community forums, tech press coverage of the update rollout, and reviewer commentary published over the phone’s first year. Where sources disagree, that’s noted rather than smoothed over.
Software updates: the promise is mostly being kept
Samsung committed to 7 years of OS and security updates for the S25 series, which on paper puts the phone on a support runway through roughly 2032 — matching Google’s Pixel commitment and setting a high bar most Android brands still don’t hit. So far, actual delivery has broadly tracked that promise, though not perfectly on schedule.
One UI 8.5 — a substantial mid-cycle update bringing features originally previewed with the Galaxy S26 line, including call screening and AI-assisted image editing — began rolling out May 6, 2026 in South Korea and expanded globally, including India, according to Android Authority’s coverage of the rollout. That rollout slipped past an earlier rumored April 30 target, which drew some frustration in Samsung’s community forums as reported by Sammy Fans, but the update did land globally within about a week of that slip rather than dragging on for months.
Looking ahead, One UI 9.0, based on Android 17, is expected to debut around late July 2026 alongside Samsung’s next foldable launch, with the S25 Ultra’s rollout following some weeks after. That’s a fairly normal cadence for Samsung’s update pattern — flagship-first for a new Android version, older devices catching up over subsequent months. For a phone that’s over a year old, still being in the first wave for a major Android version update is a genuinely good sign for the update commitment holding up.
Battery: two very different owner experiences
This is where long-term reports diverge sharply, and it’s worth being upfront that the split doesn’t cleanly map to “early units bad, later units fine” or any other simple explanation.
On one side, some owners report battery performance holding up well past the six-month mark, with one widely cited long-term review from 9to5Google specifically calling out consistent standby time as a strength even deep into ownership. That matches what you’d expect from Samsung’s stated 5,000 mAh cell and generally efficient Snapdragon 8 Elite chipset under normal conditions.
On the other side, Samsung’s own community forums carry a steady stream of complaints describing a different pattern: batteries that performed fine initially, then degraded noticeably over a period of weeks, in some cases dropping from roughly 20 hours of mixed use down to under 12 hours with similar screen-on time. Notably, a widely reported issue in April 2026 tied a specific security update to battery drain and overheating across a broad swath of Galaxy S25 units — Samsung had not issued a public fix at the time that was reported, according to Forbes’ coverage of the incident.
The practical read: a portion of the battery complaints appear to be software-triggered rather than pure hardware wear, since sudden drops tied to particular update windows aren’t consistent with the gradual capacity fade you’d expect from normal battery aging. That’s a meaningfully different problem than a battery simply wearing out — it means some of these issues are plausibly fixable in a future patch, but it also means an owner can be blindsided by a working phone suddenly behaving worse after an update they didn’t choose to skip.
Common complaints beyond battery
Outside of battery-specific threads, a smaller number of owners report heat generation during otherwise light tasks — a complaint sometimes linked to the same update-related battery issues, sometimes reported independently. There isn’t strong public evidence pointing to widespread camera hardware failures, screen defects, or structural issues at scale; the complaint volume concentrates heavily around battery and thermal behavior rather than build quality.
This pattern — software-linked battery quirks rather than broad hardware failure reports — is fairly typical for a flagship phone a year into its life. It’s worth checking Samsung’s community forums for your specific update version if you already own the phone and notice a sudden change, since a fix or workaround is more likely to already be documented there than to require a service center visit. If you’re weighing whether any drain you’re seeing is normal aging versus something else, understanding what actually degrades a phone battery is a useful baseline before assuming the worst.
How the S25 Ultra’s year-one story compares to typical flagship patterns
| Area | S25 Ultra, ~18 months in | Typical flagship pattern at this age |
|---|---|---|
| Update commitment | 7 years promised, tracking close to schedule | Varies widely; 3-5 years OS updates common outside Samsung/Google |
| Update delivery cadence | Mostly on time, occasional 1-2 week slips | Slips of weeks to months are common industry-wide |
| Battery reports | Split — many report solid longevity, a vocal subset reports update-linked drain | Some gradual capacity fade expected; sudden drops usually flag a software issue |
| Major hardware complaints | Not widely reported at scale | Varies by model and manufacturing run |
| Software feature updates | Getting new features (One UI 8.5) a year post-launch, ahead of many rivals | Feature updates often taper off after the first year on non-flagship brands |
What this means if you’re considering buying one now
If you’re looking at a new or lightly used S25 Ultra in mid-2026, the update runway is the strongest argument in its favor — you’re buying into a support window that plausibly extends to 2032, and the phone is still receiving substantial feature updates, not just security patches. The battery situation is the one area worth going in with realistic expectations: most owners don’t report serious problems, but a meaningful subset has, and the reported cause skews toward specific software updates rather than universal hardware wear.
If you’re buying used, it’s worth specifically asking the seller whether they experienced the April 2026 battery/heat issue and whether it was resolved, since that’s a documented, dated event you can ask about directly rather than a vague “how’s the battery” question. If you’re new to buying a used flagship in general, a proper pre-purchase checklist covers the broader steps worth taking regardless of which model you’re looking at.
Frequently asked questions
Is the Galaxy S25 Ultra’s battery actually bad after a year?
Reports are mixed rather than uniformly bad. Multiple owners and at least one long-term professional reviewer describe solid standby and daily performance well past six months, while a separate, vocal set of community forum threads describe real drain and heat problems — several of which appear tied to specific software updates rather than pure battery aging.
How many more years of updates will the S25 Ultra get?
Samsung’s official commitment is 7 years of OS and security updates from launch, which puts the support window at roughly 2032. As of mid-2026, delivery has broadly tracked that promise, including still receiving substantial feature updates like One UI 8.5 more than a year after launch.
Was there a specific known issue with the S25 series and battery drain?
Yes — Forbes reported in April 2026 on a security update that appeared to trigger battery drain and overheating issues across a broad number of Galaxy S25 devices, with Samsung not having issued a public fix at the time of that reporting. If you’re experiencing sudden battery problems, checking whether it started after a specific update is a reasonable first diagnostic step.
Does One UI 9 (Android 17) work on the S25 Ultra?
It’s expected to, based on Samsung’s update commitment and typical rollout pattern — One UI 9.0 is anticipated around late July 2026, launching first alongside new hardware before rolling out to existing devices including the S25 series over the following weeks.
Should I trust random forum complaints as representative of all units?
Treat them as signal, not proof of a universal defect. Forum threads over-represent people having problems, since satisfied owners rarely post about a phone working normally. The useful takeaway isn’t “this phone has bad battery” — it’s that a documented, update-linked issue existed at a specific point, which is different from generalized hardware unreliability.
Bottom line
A year and a half in, the Galaxy S25 Ultra’s software update story is a genuine strength — Samsung has mostly delivered on its lengthy support promise, including meaningful feature updates well past launch. Battery experiences split owners into two real camps, and the more serious complaints trace to specific software updates rather than uniform hardware wear, which is a different and somewhat more fixable problem than a battery simply failing with age. Anyone buying used should ask directly about the April 2026 update issue; anyone already owning one should check whether unusual drain lines up with a specific update before assuming the battery itself is failing.