OnePlus has announced that the OnePlus 15 will use the same headline battery and charging hardware globally, which represents a rare leg-up for power-reliant users in all territories. That includes a 7,300mAh cell, 120W wired charging and 50W wireless charging all crossing borders, alongside features geared at making those fast charge times more sustainable and ensuring thermal control.
A 7,300mAh Pack That’s Here for the Long Haul
The heart is the 7,300mAh battery — among the largest found on a mainstream flagship phone. OnePlus claims the pack is designed to maintain more than 80% capacity after four years, a statement that fits with the brand’s Battery Health Engine approach as adopted by some recent models. Reliable operation down to -20°C is also advertised by the company, presumably for users in colder climates and outdoor use.
OnePlus hasn’t provided much detail on the exact chemistry, but in most modern high-wattage systems that means using a dual-cell architecture to split current and reduce the load during fast charging. Combined with adaptive algorithms that control current and temperature in real time, it all leads to faster top-ups with less wear. Third-party labs such as TÜV Rheinland have confirmed battery longevity and charging safety on OnePlus’ older models, and the company’s new claims hint at the same for its newer phones.
120W SuperVOOC Charging Goes International for OnePlus 15
OnePlus 15 also provides 120W SuperVOOC proprietary wired charging support and a maximum of 50W AirVOOC wireless charging when combined with supported adapters and cables globally. The parity with the Chinese variant is significant since it’s not uncommon for international releases to scale charging speeds downward. And here, OnePlus is staying with its foot heavily on the accelerator.
There is, of course, one regional catch — wired charging in the US tops out at 80W thanks to regional certification regulations and 110V household mains; a figure that’s still in keeping with previous OnePlus flagships. Elsewhere, users will be able to see the full 120W spec. In all markets, though, the in-box charger and certified cables continue to be important; USB Power Delivery fallbacks generally provide lower wattages.
Bypass Charging Delivers Cooler, Longer Game Time
Power isn’t just about speed. The global model has a bypass charging mode that will send power directly to the system when plugged in, decreasing battery heat and cycle count during long sessions. This is especially useful in games or when navigating — situations where the device is under high load, even when plugged into a charger.
Pair that with the phone’s 165Hz-capable display and the advantage becomes simple: reduced thermals and steadier frame rates when you’re pushing both the chipset and GPU.
Sustainable charging at high wattage is one of the most difficult tests for a phone’s cooling system; bypass mode helps to reduce that stress and supports long-term battery health.
Speed Is Supported by Safety and Durability
The list of ingress ratings for the 15 is surprisingly exhaustive: IP66, IP68, IP69 and IP69K. In practical applications, that means everything from dust resistance to submersion and even high-pressure (not to mention high-temperature) water jets — an important feature for customers who work outside or in inhospitable conditions where phones are frequently exposed to the elements.
On the charging side, OnePlus and its sister companies have long loaded multiple layers of protection into their VOOC design — granular temperature monitoring and voltage/current fail-safes at the adapter, cable and device. And while the company hasn’t announced a sensor count for this model, charging at 120W means tight control loops, and that’s what the safety envelope shown here reflects.
What It Means for Buyers in the US and Worldwide
For once, international buyers aren’t having to trade battery size or charging speed. As in China, the 7,300mAh capacity and 120W wired spec are available outside the US, and the same wireless and bypass charging features apply. US buyers still get the big battery and wireless charging, with wired speeds reaching a maximum of 80W — fast enough for rapid mid-day top-ups that don’t result in too much downtime.
That’s right: big battery, aggressive but controlled charging, and rare IP69K-level durability all put the OnePlus 15 aces up out there for hard users, mobile road warriors and gamers. Just bear in mind that to hit the advertised speeds you’ll need to use the official charger and cable, and your device will intelligently modulate power output on the fly to strike a balance between speed, heat and longevity — all working together to retain that 80% capacity target for years down the line.