MobileNov 13, 2026, 10:39 AM UTC·1 min read

12,000 mAh phones are coming, and Xiaomi is already building them

A few years ago 5,000 mAh was the ceiling. Now Xiaomi is reportedly mass-producing phones with up to 12,000 mAh batteries, and 14,000 mAh models are in the works.

A thick smartphone shown next to a large battery icon, illustrating phones with 12,000 mAh capacity. — Image: Spider's Web

Phone batteries are growing fast. Xiaomi is reportedly already mass-producing smartphones with batteries of up to 12,000 mAh, more than double what was normal not long ago.

For years, 5,000 mAh was the standard and few people imagined going much beyond it. What changed is silicon-carbon battery technology, which packs more energy into the same space and removed the old limits. Chinese brands are now racing each other to ship the biggest battery.

The Redmi line shows how far this has gone. Values around 8,500 to 9,200 mAh are no longer unusual there. The Xiaomi Redmi Note 17 Pro Max has a 9,210 mAh battery and is slightly thinner than the iPhone 18 Pro (Max), which has 5,400 mAh.

According to the latest reports, the 12,000 mAh devices are not niche gear. They are mainly mid-range phones similar to the Redmi Note 17 Pro Max. Xiaomi is also said to be working on 13,000 and 14,000 mAh models, which are rumoured to debut next year.

Which other phone makers are making big-battery phones?

Xiaomi is not alone. Honor, vivo and Oppo already sell models with around 10,000 mAh, and they plan versions with 12,000 or 13,000 mAh.

Why are European phones getting smaller batteries?

Development moves fastest in China, where battery rules for consumer electronics are less strict than in Europe. That is why the Chinese Redmi Note 17 Pro Max comes with a capacity closer to 10,000 mAh, while the version sold in Europe has 9,210 mAh. Makers also have to find ways around regulations that still hold back faster progress.

So if you live in Europe, expect the huge batteries to arrive later and a bit smaller than in China.

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