Quick summary
The Samsung Galaxy S27 Ultra could get a battery upgrade compared to the Galaxy S26 Ultra – with the S27 Pro getting a bigger battery than expected.
This could mean that these next-generation flagship Samsung devices will last longer than their predecessors.
Samsung could change the battery capacities of its future flagship phones, after switching to silicon-carbon battery technology in the recent Galaxy Z devices.
In recent years, Samsung’s approach to batteries has been conservative, which means that these changes represent a pretty big change for the company.
According to a new leak, the Samsung Galaxy S27 Ultra will have a 5700mAh battery, while the Galaxy S27 Pro will have a 5200mAh battery.
Although these values may not sound huge compared to the battery you find in an Oppo or Honor phone, it is a strong increase compared to the 5000mAh Galaxy S26 Ultra.
As for the Galaxy S27 Pro, there is currently no Pro, but this is thought to be a more compact device than the Ultra and without S Pen support.
These details come from a regulatory listing at 3C (via GSMArena), so there’s a good chance this early leak is legitimate, with Samsung’s new devices expected to be announced in early 2027.
Until now, we have seen the renders of the next generation of devices from Samsung, which suggests a rather radical change in design, sticking to the looks of the iPhone. The big change here appears to be the introduction of the Pro, with Samsung adding a second premium device that will presumably carry a higher price tag than the Plus model it replaces.
We have heard that Samsung will increase the charging speed to 60W, which is certainly a given considering that the iPhone 18 Pro made the move to 60W, while it is also said that Samsung’s next flagship phone will drop a camera – removing one of the zoom lenses.
The increase in battery life still falls short of recent rival devices, such as the Oppo Find X10 Pro Max, said to have an 8000mAh battery. Samsung’s slightly more reserved position on both battery capacity and charging is in line with brands like Apple and Google and is most likely aimed at battery endurance.
The move to silicon-carbon has been praised by some, but the most interesting change this has brought about is a reduction in supported charge cycles. Many Samsung phones of the past were rated for 2000 charge cycles, but the recent Galaxy Z models that use silicon-carbon have dropped that to 1200 charge cycles.
That could represent a drop in real world endurance. Of course, we won’t know what that looks like for a few years.