February 22, 2026, 11:48 am | Read time: 3 minutes
A dead battery can quickly become a problem in everyday life. In China, some manufacturers are therefore focusing on smartphones with extremely large batteries. But why are such models hardly available here?
An example: The Oukitel WP100 Titan boasts 33,000 milliampere-hours, or mAh. This unit indicates how much electrical charge a battery can store. The device is over 35 millimeters thick, has a 6.8-inch display, and weighs 875 grams. This makes it almost as heavy as a small laptop—and more than four times as heavy as a Galaxy S25 Ultra.
How extraordinary this value is shown by a rule from Europe: Power banks are only allowed in carry-on luggage on planes up to a maximum of 100 watt-hours without approval. Watt-hours describe the energy content of a battery. At the usual 3.7 volts for smartphones, 100 watt-hours correspond to 27,000 mAh. The Oukitel is therefore well above this and would not be allowed on a plane without approval.
Other examples include the Ulefone Armor 24 with 22,000 mAh and the Honor Power2 with 10,080 mAh. For comparison: A Samsung Galaxy S25 Ultra has 5000 mAh, a Google Pixel 10 Pro has 4870 mAh, and the Apple iPhone 17 Pro has about 3988 mAh (at least in Europe). Milliampere-hours alone do not directly indicate runtime but serve for comparability.
Why Such Models Are Common in China
Brands like Oukitel and Ulefone cater to a niche in China. The WP100 Titan is aimed at outdoor and camping enthusiasts. Those who are on the go for long periods without an outlet benefit from a large battery. Rugged uses such as long hiking tours or days on a construction site are also the focus. According to the market research institute Counterpoint, the average smartphone battery in China is larger than elsewhere. On average, it is 5,418 mAh, which is 500 mAh more than in the rest of the world.
According to Counterpoint, this is because producers in China are increasingly using silicon-carbon-based batteries for the domestic market. These are characterized by a higher energy density compared to traditional lithium-ion batteries, allowing larger amounts of energy to be stored in a slimmer design. Established brands like Samsung or Apple have so far refrained from using this technology, not least because questions about the long-term durability of the energy storage systems have not yet been fully resolved.
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Very large batteries also bring problems. They require a lot of space in the housing and make the device unwieldy and heavy. This can affect camera quality, speakers, antennas, or cooling. Additionally, large batteries are expensive. There are also sturdy housings with metal reinforcement and rubber edges, which further increase costs. Another disadvantage is the charging time. The larger the battery, the longer it takes to charge.
Why Such Devices Are Rare in Europe
Many users in Europe do not accept such heavy smartphones. Devices over 200 grams, like the Galaxy S25 Ultra or iPhone 17 Pro Max, often face criticism. Instead, many desire a balanced ratio between battery life and portability. Flagships usually offer between 4000 and 5000 mAh. This is enough for one to two days, depending on usage.
Additionally, strict product liability rules apply in the European Union. They are intended to protect against battery fires and other risks. The higher the energy content, the more complex and expensive the certification becomes. Environmental regulations, such as the easy replacement of the battery or disposal at the end of its life, also make particularly large batteries more difficult.