{"slug":"oneplus-15-vs-samsung-galaxy-s26-ultra-vs-samsung-galaxy-s25-ultra","title":"OnePlus 15 vs Galaxy S26 Ultra vs Galaxy S25 Ultra: Best for Battery?","url":"https://www.aversusb.net/compare/oneplus-15-vs-samsung-galaxy-s26-ultra-vs-samsung-galaxy-s25-ultra","faqCount":6,"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."},{"question":"Which charges fastest?","answer":"The OnePlus 15. OnePlus lists 80W SUPERVOOC wired charging, up to 100W with its 100W adapter, and 50W AIRVOOC wireless charging. Samsung lists up to 60W wired and up to 25W wireless for the Galaxy S26 Ultra."},{"question":"Does the OnePlus 15 have a stylus like the S Pen?","answer":"No. The S Pen is built into the Galaxy S26 Ultra and the Galaxy S25 Ultra. If you will not use it, it should not decide the purchase."},{"question":"Is the S26 Ultra worth it over the S25 Ultra?","answer":"Both have a 5,000mAh battery, a 6.9-inch screen, a 200MP main camera, and the S Pen. The S26 Ultra adds about a year of extra security support, to February 2033 against January 2032, and Samsung lists up to 60W wired charging for it. If the S25 Ultra is clearly cheaper and January 2032 covers your keep, it is the better value."}],"faqPageSchema":{"@context":"https://schema.org","@type":"FAQPage","@id":"https://www.aversusb.net/compare/oneplus-15-vs-samsung-galaxy-s26-ultra-vs-samsung-galaxy-s25-ultra#faq","url":"https://www.aversusb.net/compare/oneplus-15-vs-samsung-galaxy-s26-ultra-vs-samsung-galaxy-s25-ultra","inLanguage":"en-US","name":"OnePlus 15 vs Galaxy S26 Ultra vs Galaxy S25 Ultra: Best for Battery? — FAQ","description":"Frequently asked questions about OnePlus 15 vs Galaxy S26 Ultra vs Galaxy S25 Ultra: Best for Battery?","dateModified":"2026-10-12T00:00:00.000Z","author":{"@type":"Organization","@id":"https://www.aversusb.net/#organization","name":"A Versus B"},"publisher":{"@type":"Organization","@id":"https://www.aversusb.net/#organization","name":"A Versus B"},"isPartOf":{"@type":"Article","@id":"https://www.aversusb.net/compare/oneplus-15-vs-samsung-galaxy-s26-ultra-vs-samsung-galaxy-s25-ultra#article"},"license":"https://creativecommons.org/licenses/by/4.0/","speakable":{"@type":"SpeakableSpecification","@id":"https://www.aversusb.net/compare/oneplus-15-vs-samsung-galaxy-s26-ultra-vs-samsung-galaxy-s25-ultra#faq-speakable","cssSelector":[".faq-answer"]},"mainEntity":[{"@type":"Question","@id":"https://www.aversusb.net/compare/oneplus-15-vs-samsung-galaxy-s26-ultra-vs-samsung-galaxy-s25-ultra#q1","name":"Which has the best battery: OnePlus 15, Galaxy S26 Ultra, or Galaxy S25 Ultra?","answerCount":1,"acceptedAnswer":{"@type":"Answer","@id":"https://www.aversusb.net/compare/oneplus-15-vs-samsung-galaxy-s26-ultra-vs-samsung-galaxy-s25-ultra#a1","text":"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.","inLanguage":"en-US","url":"https://www.aversusb.net/compare/oneplus-15-vs-samsung-galaxy-s26-ultra-vs-samsung-galaxy-s25-ultra","upvoteCount":1,"author":{"@type":"Organization","@id":"https://www.aversusb.net/#organization","name":"A Versus B"}}},{"@type":"Question","@id":"https://www.aversusb.net/compare/oneplus-15-vs-samsung-galaxy-s26-ultra-vs-samsung-galaxy-s25-ultra#q2","name":"How long will the OnePlus 15 get software updates?","answerCount":1,"acceptedAnswer":{"@type":"Answer","@id":"https://www.aversusb.net/compare/oneplus-15-vs-samsung-galaxy-s26-ultra-vs-samsung-galaxy-s25-ultra#a2","text":"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.","inLanguage":"en-US","url":"https://www.aversusb.net/compare/oneplus-15-vs-samsung-galaxy-s26-ultra-vs-samsung-galaxy-s25-ultra","upvoteCount":1,"author":{"@type":"Organization","@id":"https://www.aversusb.net/#organization","name":"A Versus B"}}},{"@type":"Question","@id":"https://www.aversusb.net/compare/oneplus-15-vs-samsung-galaxy-s26-ultra-vs-samsung-galaxy-s25-ultra#q3","name":"How long will the Galaxy S26 Ultra and S25 Ultra get updates?","answerCount":1,"acceptedAnswer":{"@type":"Answer","@id":"https://www.aversusb.net/compare/oneplus-15-vs-samsung-galaxy-s26-ultra-vs-samsung-galaxy-s25-ultra#a3","text":"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.","inLanguage":"en-US","url":"https://www.aversusb.net/compare/oneplus-15-vs-samsung-galaxy-s26-ultra-vs-samsung-galaxy-s25-ultra","upvoteCount":1,"author":{"@type":"Organization","@id":"https://www.aversusb.net/#organization","name":"A Versus B"}}},{"@type":"Question","@id":"https://www.aversusb.net/compare/oneplus-15-vs-samsung-galaxy-s26-ultra-vs-samsung-galaxy-s25-ultra#q4","name":"Which charges fastest?","answerCount":1,"acceptedAnswer":{"@type":"Answer","@id":"https://www.aversusb.net/compare/oneplus-15-vs-samsung-galaxy-s26-ultra-vs-samsung-galaxy-s25-ultra#a4","text":"The OnePlus 15. OnePlus lists 80W SUPERVOOC wired charging, up to 100W with its 100W adapter, and 50W AIRVOOC wireless charging. Samsung lists up to 60W wired and up to 25W wireless for the Galaxy S26 Ultra.","inLanguage":"en-US","url":"https://www.aversusb.net/compare/oneplus-15-vs-samsung-galaxy-s26-ultra-vs-samsung-galaxy-s25-ultra","upvoteCount":1,"author":{"@type":"Organization","@id":"https://www.aversusb.net/#organization","name":"A Versus B"}}},{"@type":"Question","@id":"https://www.aversusb.net/compare/oneplus-15-vs-samsung-galaxy-s26-ultra-vs-samsung-galaxy-s25-ultra#q5","name":"Does the OnePlus 15 have a stylus like the S Pen?","answerCount":1,"acceptedAnswer":{"@type":"Answer","@id":"https://www.aversusb.net/compare/oneplus-15-vs-samsung-galaxy-s26-ultra-vs-samsung-galaxy-s25-ultra#a5","text":"No. The S Pen is built into the Galaxy S26 Ultra and the Galaxy S25 Ultra. If you will not use it, it should not decide the purchase.","inLanguage":"en-US","url":"https://www.aversusb.net/compare/oneplus-15-vs-samsung-galaxy-s26-ultra-vs-samsung-galaxy-s25-ultra","upvoteCount":1,"author":{"@type":"Organization","@id":"https://www.aversusb.net/#organization","name":"A Versus B"}}},{"@type":"Question","@id":"https://www.aversusb.net/compare/oneplus-15-vs-samsung-galaxy-s26-ultra-vs-samsung-galaxy-s25-ultra#q6","name":"Is the S26 Ultra worth it over the S25 Ultra?","answerCount":1,"acceptedAnswer":{"@type":"Answer","@id":"https://www.aversusb.net/compare/oneplus-15-vs-samsung-galaxy-s26-ultra-vs-samsung-galaxy-s25-ultra#a6","text":"Both have a 5,000mAh battery, a 6.9-inch screen, a 200MP main camera, and the S Pen. The S26 Ultra adds about a year of extra security support, to February 2033 against January 2032, and Samsung lists up to 60W wired charging for it. If the S25 Ultra is clearly cheaper and January 2032 covers your keep, it is the better value.","inLanguage":"en-US","url":"https://www.aversusb.net/compare/oneplus-15-vs-samsung-galaxy-s26-ultra-vs-samsung-galaxy-s25-ultra","upvoteCount":1,"author":{"@type":"Organization","@id":"https://www.aversusb.net/#organization","name":"A Versus B"}}}]}}