Samsung’s latest 2nm GAA ambitions are being questioned again after a new real-world battery drain test showed a surprisingly large gap between two versions of the Galaxy S26. In a side-by-side comparison, the Galaxy S26 powered by the Exynos 2600 fell far behind the Snapdragon 8 Elite Gen 5 model, despite both phones being otherwise identical. The final difference was hard to ignore: 2 hours and 38 minutes of additional runtime for the Snapdragon variant.
The test, conducted by YouTube channel Android Addicts, aimed to keep conditions as even as possible. Wi‑Fi was turned off, and 5G was enabled to mirror the way many people use their phones day to day. The results suggest that the Exynos 2600 struggles under sustained workloads, especially when heat builds up inside the phone.
One of the most telling moments occurred during video encoding. This is the kind of demanding task that pushes a processor hard for an extended period, and it’s also the kind of workload that exposes efficiency problems quickly. During that portion of the test, the Exynos 2600 Galaxy S26 reportedly began overheating, which is a major warning sign for both performance stability and battery life. Higher internal temperatures typically cause faster power consumption, and in many cases trigger aggressive throttling to protect the hardware—both of which can shorten overall runtime.
The underlying issue may be tied to the Exynos 2600’s 10-core CPU design. When stressed, the chip appears to push into higher power limits that are difficult to maintain in a compact smartphone body. Previous compute benchmarks have already hinted at this behavior, with the Exynos 2600 reportedly reaching a peak power draw around 30W in certain scenarios—figures that can be extremely challenging to sustain without generating excess heat. Even if those spikes only happen briefly, repeated bursts throughout normal use can still add up and drain the battery faster than expected.
By the end of the full battery drain run, the Galaxy S26 with Snapdragon 8 Elite Gen 5 lasted 9 hours and 26 minutes. The Exynos 2600 version shut down at 6 hours and 48 minutes. That works out to roughly a 28 percent battery life advantage for the Snapdragon model—an unusually large gap for two phones that are otherwise the same.
For Samsung, this kind of disparity raises uncomfortable questions. If the company is positioning its 2nm GAA process as a major leap forward, real-world efficiency should improve, not slide backward. The outcome suggests either the manufacturing process isn’t delivering the efficiency gains many expected, or the Exynos design itself—particularly the CPU cluster and its power behavior—needs to be rebalanced. Another possible solution could be dialing back the core count or tuning the chip more conservatively to reduce peak draw and heat, even if it costs some top-end performance.
If Samsung wants future Exynos chips to compete head-to-head on premium phones, battery efficiency under sustained workloads may need to become the top priority—because for most users, longer battery life matters more than brief benchmark wins.
