According to recent leaks, Samsung is preparing a major update for the Galaxy S Ultra series, targeting what has long been considered its primary weakness, namely battery life. The new cells are rumored to reach 6000 mAh capacity, accompanied by an improved fast charging system. This change could redefine expectations for Android flagships in 2027.
6000 mAh capacity to compete with rivals
Rumors indicate that the Galaxy S27 Ultra will feature a 6000 mAh battery, a significant increase from the 5000 mAh of its predecessor. This leap would allow the device to surpass competitors like the iPhone 17 Pro Max and Pixel 11 Pro, which top out at 4850 mAh and 5100 mAh respectively. The higher energy density is made possible by new cell assembly techniques, similar to those used in electric vehicle battery packs. Samsung has indirectly confirmed investment in solid-state battery R&D, but sources suggest the implemented solution will still be lithium-ion based, optimized for long-term durability.
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65W wired and 45W wireless fast charging
Beyond capacity, Samsung would introduce 65W wired charging, aligning with the best Chinese Android standards, and 45W wireless charging. This marks a sharp improvement over previous generations' 45W wired and 15W wireless. Fast wireless charging will require the new Samsung EP-N5900 charger, which uses the Qi2 standard with extended power profile. Users can thus achieve a full charge in about 35 minutes via cable and 55 minutes wirelessly.
Impact on design and thickness
The capacity increase has raised concerns about added weight and thickness. However, according to leaks, Samsung has managed to keep thickness under 8.5 mm by adopting a new three-stack internal architecture. Weight is expected to be around 230 grams, only 10 grams heavier than the Galaxy S26 Ultra. This was achieved by collaborating with suppliers like LG Energy Solution and Samsung SDI to develop thinner cells while maintaining thermal safety.
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Competition landscape and launch timeline
Samsung's move comes as battery life has become the decisive factor for 78% of premium smartphone buyers, according to a Counterpoint Research survey. Meanwhile, Apple has announced delays in its Mac roadmap due to memory chip shortages, highlighting global supply chain tensions. Samsung, in contrast, appears to have secured supplies for the new batteries, with contracts already finalized. The Galaxy S27 Ultra launch is expected in January 2027, following Samsung's traditional schedule. For more on tech supply chain challenges, read about the Mac roadmap 2026-2027. For additional information on battery technology, consult the Wikipedia page on lithium-ion batteries.
Source: https://www.androidpolice.com/samsung-may-finally-fix-galaxy-s-ultras-biggest-weakness
