Vivo X300 Ultra: A beast of endurance prepares to challenge the OPPO Find X9 Pro
The OPPO Find X9 Pro has been impressing since its launch with its massive 7,500 mAh battery, granting it several days of autonomy and earning it the unofficial title of “king of endurance.” However, this reign may be short-lived: Vivo is reportedly preparing to retaliate with the Vivo X300 Ultra featuring a nearly as extreme capacity.
According to a leak from reliable leaker Smart Pikachu on Weibo, Vivo is planning a launch in the first quarter of 2026. This information is backed by Digital Chat Station, which previously mentioned a launch window in March 2026 — perfectly in line with Vivo’s typical flagship release schedule.
Vivo X300 Ultra: A Battery Aiming for the Throne
Vivo has made battery life a key selling point in recent years:
Vivo X200 Ultra: 6,000 mAh (silicon-carbon)Vivo X300: 6,040 mAhVivo X300 Pro: 6,510 mAh
The trend is clear: a gradual increase in capacity… until the Vivo X300 Ultra makes a dramatic leap to around 7,000 mAh.
This figure would place it among the current champions:
OPPO Find X9 Pro: 7,500 mAhXiaomi 17 Pro Max: 7,500 mAh
With such capacity, Vivo positions itself directly in the race for the most enduring smartphones on the market. The real question becomes: will OPPO push the limit even further with an 8,000 mAh Find X9 Ultra?
This rumor has been circulating for months — and if confirmed, the battle of battery giants in 2026 will be particularly fierce.
A Premium Device… Still Under Wraps
Few technical details have surfaced, but initial leaks suggest a clearly premium device:
Snapdragon 8 Elite Gen 5: Qualcomm’s most advanced chip for 2026, already announced for several future high-end flagships.New camera module featuring a 35 mm lens: Vivo is rumored to focus on a Sony Lytia 901 main sensor, paired with this more “photographic” focal length, promising a more natural rendering and an organic bokeh.Global launch on the first day: A great piece of news: unlike the Vivo X200 Ultra, which remained exclusive to China, the Vivo X300 Ultra is expected to be launched internationally right away.A Major Challenger for Early 2026
If it confirms this XXL battery, its new sensor, and the integration of the Snapdragon 8 Elite Gen 5, the Vivo X300 Ultra could become one of the most anticipated flagships at the start of 2026 — and a serious competitor to OPPO and Xiaomi in the extreme endurance arena.
Vivo seems determined not to allow any manufacturer to dominate the Ultra segment for long.