{"slug":"oneplus-15-vs-samsung-galaxy-s26-ultra-vs-samsung-galaxy-s25-ultra","question":"OnePlus 15 vs Galaxy S26 Ultra vs Galaxy S25 Ultra: Best for Battery?","answer":"If battery life comes first, the OnePlus 15 has the biggest battery of the three: OnePlus lists 7,300mAh with 80W SUPERVOOC wired and 50W AIRVOOC wireless charging, against 5,000mAh on both Galaxy Ultras. If you want the longest update window, the S Pen, or to stay on One UI, pick a Galaxy Ultra. Samsung lists seven OS upgrades for both, with security updates to February 2033 on the S26 Ultra and January 2032 on the S25 Ultra. OnePlus lists security updates for the OnePlus 15 to November 13, 2031. Neither is better for everyone; it depends on whether battery or software and the S Pen matter more.","answer_curated":true,"verdict":"Best for battery and charging speed: OnePlus 15. 7,300mAh, 80W wired and 50W wireless, security updates to November 2031.\n\nBest for the longest update window and the S Pen: Galaxy S26 Ultra. Seven OS upgrades and security updates to February 2033, 60W wired.\n\nBest for Samsung software and the S Pen at an older-model price: Galaxy S25 Ultra. Seven OS upgrades and security updates to January 2032.\n\nNeither is better for everyone; it depends on whether battery or software and the S Pen matter more.","keyDifferences":[{"label":"Who it is for","entityAValue":"Battery and fast charging","entityBValue":"Longest updates and S Pen","values":["Battery and fast charging","Longest updates and S Pen","One UI and S Pen for less"],"winnerIndex":"tie"},{"label":"Battery","entityAValue":"7,300mAh","entityBValue":"5,000mAh","values":["7,300mAh","5,000mAh","5,000mAh"],"winnerIndex":0},{"label":"Security updates until","entityAValue":"November 2031","entityBValue":"February 2033","values":["November 2031","February 2033","January 2032"],"winnerIndex":1},{"label":"S Pen","entityAValue":"No","entityBValue":"Built in","values":["No","Built in","Built in"],"winnerIndex":"tie"}],"winner":{"slug":"oneplus-15","name":"OnePlus 15"},"confidence":"high","entities":[{"name":"OnePlus 15","slug":"oneplus-15","url":"https://www.aversusb.net/entity/oneplus-15","alternativesUrl":"https://www.aversusb.net/api/v1/alternatives/oneplus-15"},{"name":"Galaxy S26 Ultra","slug":"samsung-galaxy-s26-ultra","url":"https://www.aversusb.net/entity/samsung-galaxy-s26-ultra","alternativesUrl":"https://www.aversusb.net/api/v1/alternatives/samsung-galaxy-s26-ultra"},{"name":"Galaxy S25 Ultra","slug":"samsung-galaxy-s25-ultra","url":"https://www.aversusb.net/entity/samsung-galaxy-s25-ultra","alternativesUrl":"https://www.aversusb.net/api/v1/alternatives/samsung-galaxy-s25-ultra"}],"faqs":[{"question":"Which has the best battery: OnePlus 15, Galaxy S26 Ultra, or Galaxy S25 Ultra?","answer":"On capacity, the OnePlus 15. OnePlus lists a 7,300mAh battery and up to 31 hours of video playback. Samsung lists 5,000mAh for both the Galaxy S26 Ultra and the Galaxy S25 Ultra, and up to 31 hours of video playback on the S25 Ultra. OnePlus also says the battery keeps 80 percent capacity after 4 years. That is OnePlus's own claim."},{"question":"How long will the OnePlus 15 get software updates?","answer":"OnePlus lists security updates for the OnePlus 15 until November 13, 2031. That is about six years from launch, not two or three. OnePlus's general policy promises a minimum of three years of security updates for phones, and the OnePlus 15 date runs well past that."},{"question":"How long will the Galaxy S26 Ultra and S25 Ultra get updates?","answer":"Samsung lists seven major OS upgrades for both. The S26 Ultra launched on Android 16 and is listed up to Android 23, with security updates until February 2033. The S25 Ultra launched on Android 15 and is listed up to Android 22, with security updates until January 2032."}],"attribution":{"source":"A Versus B","url":"https://www.aversusb.net/compare/oneplus-15-vs-samsung-galaxy-s26-ultra-vs-samsung-galaxy-s25-ultra","license":"CC BY 4.0","citationFormat":"According to A Versus B (https://www.aversusb.net/compare/oneplus-15-vs-samsung-galaxy-s26-ultra-vs-samsung-galaxy-s25-ultra), If battery life comes first, the OnePlus 15 has the biggest battery of the three: OnePlus lists 7,300mAh with 80W SUPERVOOC wired and 50W AIRVOOC wireless charging, against 5,000mAh on both Galaxy Ult","dateModified":"2026-10-12T00:00:00.000Z"},"relatedQuestionsUrl":"https://www.aversusb.net/api/faq/oneplus-15-vs-samsung-galaxy-s26-ultra-vs-samsung-galaxy-s25-ultra","relatedComparisonsUrl":"https://www.aversusb.net/api/v1/related/oneplus-15-vs-samsung-galaxy-s26-ultra-vs-samsung-galaxy-s25-ultra","knowledgeGraphUrl":"https://www.aversusb.net/api/knowledge-graph/oneplus-15-vs-samsung-galaxy-s26-ultra-vs-samsung-galaxy-s25-ultra"}