The first solid clues about the POCO F8 Ultra and F8 Pro battery They point to a different strategy than the Redmi K90 on which they are based. According to HyperOS code analysis, the POCO F8 Pro would integrate 6210mAhwhile the LITTLE F8 Ultra would rise to 6500mAh. These are notable figures, but lower than those of the Redmi K90 (7100 mAh) and K90 Pro Max (around 7500 mAh), which suggests an adjustment for lighten weight and thickness in global versions.
This reduction would not necessarily imply worse autonomy, as long as the rest of the set is well optimized: Snapdragon 8 Elite chips and 8 Elite Gen 5 Depending on the model, 2K OLED panels at 120 Hz and the optimizations of HyperOS 3, based on Android 16, should help contain consumption. Additionally, the Ultra is expected to maintain 100W fast charging and add wireless charginga combination, already present in its Chinese twin, consistent with POCO's high-end approach.
Why would POCO trim the battery?
If we look at the previous generation, the POCO F7 already included batteries somewhat minor than their Redmi equivalents, without the autonomy suffering excessively. Everything indicates that POCO prioritizes the balance between thickness, weight and thermal control. This is especially relevant in markets where design and comfort in hand weigh as much as energy capacity. The other key is in the materials: The Redmi K90 have released high-capacity batteries with chemistry silicon-carbonbulkier, something that might not fit with POCO's design goals for its global version.
Beyond the nominal capacity, advances in SoC efficiency and HyperOS power management usually make up for that difference. If high-frequency LTPO panels with adaptive refresh rate are also incorporated, it is reasonable to expect a full day of intensive use in both models, and much more in the Ultra for less demanding profiles.
What is known about the rest of the hardware
The leaks talk about POCO F8 Pro with screen 6.59 inch OLED and of LITTLE F8 Ultra that would grow until 6.9 inchesboth with ultrasonic fingerprint reader under the panel. In memory, there would be versions of up to 16GB RAM and 512GB storage (with some editing of 1TB planned for the Ultra in certain markets). In cameras, the Ultra would aim for three 50 MP sensorswith periscopic telephoto lens as the main photographic attraction.
As always, it is advisable to take everything with a grain of salt: these are leaks that are likely to change as the global presentation, scheduled for early 2026. However, the pattern is clear and fits with Xiaomi's roadmap: POCO inherits pointer hardware of Redmi and adapts it to global taste with battery settings and layout.
Sufficient autonomy or lost opportunity?
It seems that for POCO the issue of autonomy in its next devices is a priority, highlighting that there are also strong rumors indicating that the POCO X8 Pro would have 9000 mAh inside, surpassing many of the competition. If these are confirmed 6210 mAh and 6500 mAhPOCO would do without the record figures of the K90, but it could gain in ergonomics and thermal control. The question is obvious: Do you prefer more capacity at the cost of thickness and weight, or a more balanced set with powerful fast charging and good software? We read you in the comments.