Exclusive: “We’re giving consumers what they need”
The Samsung Galaxy S25 Edge is receiving a lot of praise for its impressive titanium design and remarkable thinness (including from us here at Mobile Tech News), but the phone’s battery, which is smaller than expected, is causing some concern.
With a capacity of 3,900mAh, the battery in the Galaxy S25 Edge is only slightly smaller than that of the standard Galaxy S25, yet it has to support a much larger 6.7-inch display.
This understandably raises questions about the Edge’s battery life, but Samsung is confident that its new device will offer sufficient battery performance for all but the most demanding users.
In an exclusive conversation with Mobile Tech News, Kadesh Beckford, Smartphone Product Specialist at Samsung MX, downplayed the notion that the Galaxy S25 Edge sacrifices battery life for a more visually appealing design.
“Even though we’ve made this device incredibly thin, we’ve tried to ensure that customers have [suitable] battery life available to them based upon their needs,” Beckford stated. “With 24 hours of video playback time and an all-day battery, [the Edge] is going to last you literally from the moment you wake up to the moment you go to bed. So, we’re actually giving [consumers] what they need [in terms of battery life].
“And also,” Beckford added, “with the lithium graphite technology and the thermal interface material in there, it keeps the device cool, so pretty much no matter what you’re doing on your phone, [it’ll] last all day long and then some.”
‘All day long and then some’ is a bold assertion for a 6.7-inch phone with a 3,900mAh battery – and it’s something we are currently testing for our comprehensive Samsung Galaxy S25 Edge review – but Beckford claims his confidence in the phone’s endurance comes from his own hands-on experience with the device prior to its official release.
“I’ve played Genshin Impact on the Galaxy S25 Edge, I’ve played PUBG,” he shared. “It moves so smoothly, it’s unbelievable, and the phone has lasted me all day – sometimes into the next day as well. I’ve seen those elements [in action].
“Do also remember that, traditionally, phones at this level of thinness don’t support wireless charging. With the custom Snapdragon 8 Elite chipset, we’ve still been able to include a thermal interface and wireless charging, with wireless power share as well, so I can even charge up my Galaxy Buds [using the Galaxy S25 Edge]. That there is real innovation.”
Beckford concluded: “You’ve also got the ability to add a Qi2 case [to the Galaxy S25 Edge] for convenience at home or in your car. So, you can easily connect it up, and your device will last all day.”
Of course, being compatible with convenient charging options isn’t the same as providing excellent battery life overall, but Beckford’s point about real-world usability is valid. For most users, the Galaxy S25 Edge will offer all-day battery life, and the phone’s wireless charging and Qi2 compatibility should ensure that it can be charged anytime, anywhere if you find yourself needing a boost.
How quickly the Galaxy S25 Edge can reach a full charge is another question. The phone supports 25W wired, 15W wireless, and 4.5W reverse wireless charging – which is similar to the standard Galaxy S25 but falls short of the Galaxy S25 Plus and S25 Ultra, both of which support 45W wired charging.
In any case, choosing the Galaxy S25 Edge over one of Samsung’s top phones will mean sacrificing some battery endurance. However, as Samsung points out, this trade-off is unlikely to be significant for those who typically charge their smartphones daily. Stay tuned for our upcoming Galaxy S25 Edge review for our own insights on the subject.
Samsung Is Using a Modified Version of the Snapdragon 8 Elite
With the device being so thin, it leaves very little room for the heat generated via the chipset to escape and/or dissipate. It appears Samsung has taken a page out of Oppo’s book. The Oppo Find N5 is currently the world’s thinnest smartphone when unfolded at 5.1mm thick… or thin depending on how you look at it. Oppo is running a modified version of the Qualcomm Snapdragon 8 Elite. The original Snapdragon 8 Elite is an incredibly powerful 8-core CPU. Oppo has worked with Qualcomm to make a custom version of the 8 Elite in the Find N5. Oppo and Qualcomm has removed a core from the 8 Elite and the Find N5 has a 7-core 8 Elite chipset.
Apparently Samsung has been working closely with Qualcomm behind the scenes to bring that same modified 7-core 8 Elite CPU to the Samsung Galaxy S25 Edge. This new version is carefully modified to provide the same power, but with one less core it generates less heat. This custom modification is imperative because the thinner the device, the less room there is for the heat to dissipate.
We at Mobile Tech News has had three Samsung Galaxy S25 Ultras and on all three devices we have had overheating issues. We kind of wish the S25 Ultra was rocking the same modified 8 Elite that comes in the S25 Edge. This is an ingenious idea that i wish more manufactures would adopt for their devices.
Early reports indicate no users as of this article have reported overheating issues associated with the S25 Edge. This was a major concern of ours prior to this modified CPU was announced.
S25 Edge Uses Samsung’s New OLED Display Tech That Sips the Power
When it comes to a device drawing power from the battery there are multiple components and parts that take the majority of the device’s battery. CPU being the biggest battery drainer and we see how Samsung addressed this in the previous section. The second biggest power drainer is the display. This is where Samsung also addressed the power consumption.
Samsung is using it’s latest and greatest OLED display technology, not even found in any other device Samsung has to offer. The new, M14 OLED display can be found on the newly released S25 Edge.
The M14 OLED display is Samsung’s latest and most advanced OLED technology, designed for improved brightness, energy efficiency, and service life. It’s being used in the all new Samsung Galaxy S25 Edge and the upcoming iPhone 17 series, potentially across all models. The M14 panel offers a 20-30% increase in brightness compared to the previous M13 generation.
Key Features of the M14 OLED Display:
Improved Brightness:
The M14 panel is significantly brighter than previous generations, offering a more vibrant and immersive viewing experience.
Enhanced Energy Efficiency:
The M14 panel is designed to be more energy-efficient, potentially leading to longer battery life for devices using this display.
Longer Service Life:
Samsung claims the M14 panels have a longer lifespan compared to earlier generations, meaning they can withstand more use before showing signs of degradation.
Use in iPhone 17 Series:
Samsung is reportedly supplying M14 OLED panels for all iPhone 17 models, including non-Pro models.
Potential for 120Hz Refresh Rate:
The M14 panel is expected to support a 120Hz refresh rate, allowing for smoother animations and scrolling in supported devices.
Samsung Implemented a New Battery Technology, Not Silicone Carbon
OnePlus needs major credit when it comes to expanding the mobile device battery field. Honor was the first mobile phone company to include a new battery technology called silicone carbon batteries in their current flagship Magic 5 Pro Series devices. Their battery technology is so good we could not help but wonder when will other manufactures include this new battery tech in their mobile phones.
Unfortunately, a company associated with Honor patented the new silicone carbon battery technology. That means if Samsung or any other company not associated with Honor has to either pay them to use the new battery technology or have to wait for the patent to expire.
It appears Samsung has gone the route of improving their battery tech choosing to bypass the previous two options. Samsung has decided to include their own new next generation battery technology they have been developing over the last few years. The new battery tech is called Lithium Graphite. The current battery technology used in mobile devices (outside of Oppo, Honor and OnePlus) is called Lithium Ion batteries. Samsung’s new Lithium Graphite is not as advanced as Honor’s silicone carbon tech but it is an improvement over the current Lithium Ion batteries. The new Lithium Graphite tech is basically in between both current lithium ion and silicone carbon. It can be classified as lithium ion 1.5 if silicone carbon is 2.0.
Anyways, the new battery technology included in the new S25 Edge is a step up in battery technology for Samsung and all next generation flagship devices from Samsung until they can come up with a 2.0 version. The new lithium graphite battery technology allows for the battery to be more dense than the typical lithium ion battery. How much more dense is up for debate but it is basically the equivalent of a normal lithium battery plus 15%. The S25 Edge has a 3,900 maH battery. If you add the 15% more density added by the new lithium graphite battery it comes out to a density of 4,485 maH lithium ion battery. This would support the numerous YouTube videos showing battery life tests between the S25 Edge and other premium flagship devices. Multiple videos show real life examples of the S25 Edge lasting up to almost 12 hours of screen on time and up to 22 hours of continuous video playback.
What is lithium graphite?
Graphite is a crucial component of a lithium-ion battery, serving as the anode (the battery’s negative terminal). Here’s why graphite is so important for batteries: Storage Capability: Graphite’s layered structure allows lithium batteries to intercalate (slide between layers).
Is a graphite battery better than lithium?
When it comes to charging speeds, battery density, longevity and safety, yes. When it comes to safety, graphite-based batteries are generally less dangerous and react with less frequency. Lithium-Ion Safety: Risk of overheating and fires, particularly with poorly manufactured or damaged cells.
Battery Life Fears Put to Rest
Thankfully Samsung has addressed the number one fear that is associated with the new Galaxy S25 Edge. Many people online have not been shy to express their opinion of the size of Samsung’s choice of battery size when it comes to the slim device. Samsung could only include a battery so big when the whole idea of a slim device is it’s thickness or lack their of. Users should be happy to know Samsung could see this question arise when launching this device and actually took the necessary steps to try and maximize every ounce of energy out of this device. Their is definitely more to the story than just the publicly displayed 3,900maH battery. The hardware changes listed above cannot be stated without mentioning the optimization of the operating system, OneUI 7. It continually gets optimized and should be noted Samsung can take extra steps in the operating system to assist in extending the battery life as well in the S25 Edge.
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