I mean, just look at that large cell inside. While long-standing OnePlus fans may be the first in line to trash the new OnePlus 15 and its design (yeah, it looks pedestrian compared to the premium-finished OnePlus 13, for example), the truth is that it’s a champion. It’s superfast, it has a bright, flat display, it’s sturdy, it’s sold for under $1,000 and, most importantly, it has the best battery life on a phone we’ve ever seen here at PhoneArena. Battery Life Charging Phone Battery Life estimate Browsing Video Gaming OnePlus 15 7300 mAh 10h 44min 30h 6min 12h 37min 14h 16min Samsung Galaxy S25 Ultra 5000 mAh 8h 0min 20h 49min 8h 54min 14h 21min Apple iPhone 17 Pro Max 5088 mAh 7h 46min 20h 9min 9h 37min 11h 34min Google Pixel 10 Pro XL 5200 mAh 6h 58min 19h 41min 10h 0min 4h 35min Samsung Galaxy Z Fold 7 4400 mAh 5h 31min 14h 18min 6h 38min 8h 43min OPPO Find X9 Pro 7500 mAh 9h 50min 25h 34min 13h 30min 11h 17min vivo X300 Pro 6510 mAh 6h 30min 15h 51min 9h 30min 7h 36min Xiaomi 15 Ultra 6000 mAh 7h 33min 16h 39min 10h 11min 13h 29min Phone Full Charging 30 min Charge Wired Wireless Wired Wireless OnePlus 15 7300 mAh 0h 45min 1h 52min 68% 21% Samsung Galaxy S25 Ultra 5000 mAh 1h 9min 1h 58min 68% 33% Apple iPhone 17 Pro Max 5088 mAh 1h 16min Untested 64% Untested Google Pixel 10 Pro XL 5200 mAh 1h 17min Untested 63% Untested Samsung Galaxy Z Fold 7 4400 mAh 1h 23min 2h 18min 46% 26% OPPO Find X9 Pro 7500 mAh 1h 20min Untested 52% Untested vivo X300 Pro 6510 mAh 0h 31min Untested 98% Untested Xiaomi 15 Ultra 6000 mAh 1h 3min Untested 58% Untested Find out more details about battery and charging for all phones we have tested on our PhoneArena Battery Score page That’s not an exaggeration, as the OnePlus 15 wipes the floor with big-name flagships like the Galaxy S25 Ultra and the iPhone 17 Pro Max. Interestingly enough, it manages to provide longer battery life even than the RedMagic 11 Pro which comes with a 7, 500 mAh capacity cell, while the OnePlus 15 offers “only” 7, 300 mAh. Let’s take a look inside Now, thanks to the YouTube channel WekiHome and the account OnePlus Club on X (an unofficial source of OnePlus-related content, which provides the English translation) we get to see the insides of the new OnePlus 15. First things first, the “most obvious structural change” compared to the OnePlus 13 is the sheer size of the battery and the space that the cell now takes. The battery has increased in size “significantly”, as you can see above. Receive the latest OnePlus news By subscribing you agree to our terms and conditions and privacy policy. The OnePlus 15 uses a 7, 300 mAh silicon-carbon battery, a high-density alternative to standard lithium-ion cells that allows for greater capacity within the same internal space. The RAM and the ROM are “Samsung-sourced”, the OnePlus Club account points out. The RAM is LPDDR5X Ultra, supporting speeds up to 10, 667 Mbps. On the left sits UFS 4. 1 storage. Beneath the RAM is Qualcomm’s Snapdragon 8 Elite Gen 5 chipset, and above the storage is the company’s in-house G2 gaming network chip. The OnePlus 15 features matching top and bottom speakers using the AAC 1510 specification, each housed in a full metal package filled with N’Bass acoustic material for enhanced sound. Compared to the previous generation’s uneven 1012H and 1115E setup, this design delivers a larger, more balanced audio experience. In our review of the OnePlus 15, we found that the dual stereo speakers can reach high volumes. While bass is almost present, the sound lacks clear separation between lows, mids, and highs, which can make music feel somewhat crowded and less refined at louder levels. So, take my advice and invest in some nice over-ear cans. Recommended For You Do you regard the OnePlus 15 as a serious flagship? Yes, totally. Mostly yes, up to a point. No. Yes, totally. 0% Mostly yes, up to a point. 0% No. 0% It’s a fascinating flagship Since I’m into mobile photography an area in which the OnePlus 15 can’t compete with dedicated camera phones like the Xiaomi 15 Ultra, the Oppo Find X8 Ultra or the new Vivo X300 Pro I can’t see myself personally buying it. But if I were forced to choose between this and any other general purpose flagship right now, I wouldn’t hesitate. The OnePlus 15 is too cool to ignore, too capable to be dismissed. And probably with a too good to be true discount this Black Friday. Unlimited plans for $15/mo at Mint! $180 $360 $180 off (50%) Mint Mobile is also offering an incredible bargain for those seeking unlimited data! The carrier’s latest deal lets you grab any unlimited plan for just $15/mo, bringing the 12-month Unlimited plan to $180 instead of $360. Buy at Mint Mobile Follow us on Google News Recommended For You FCC OKs Cingular\’s purchase of AT&T Wireless.
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