Phones With 12,000mAh Batteries Are Near, vivo Leak Says

According to IThome, vivo has a 12,000mAh battery in mass production. The battery race among Chinese brands has been growing for months. The post adds that an even larger battery is in development and will arrive with a new large-screen device. It gives no phone name and no date. Still, it suggests that phones with batteries above 10,000mAh are moving from testing toward real products.

The post says the largest battery vivo has mass-produced has reached 12,000mAh, with a plus sign after the number. The plus sign suggests the real figure may be a little higher.

The leak does not say which phone will use the cell first. It also does not say whether the number is the rated or the typical capacity. Since typical capacity is usually higher than rated capacity, its pretty important. A plus sign without a clear label should be read with care.

Capacity this high usually comes from silicon-carbon cells. Silicon-carbon batteries have become common in China, where brands compete on endurance. These cells store more energy than graphite designs, so a phone can gain capacity without growing much. An earlier leak from February described a 4.53V single-cell silicon battery for vivo. Its rated capacity was 10,000mAh, with a typical capacity said to reach 11,000 to 12,000mAh. If the new 12,000mAh++ figure is the typical value, it would fit that earlier description. That is only a guess, because the new post gives no technical detail.

The second part of the leak is more interesting. vivo is said to be working on a larger-capacity battery solution that will launch together with a new large-screen device. The leak gives no screen size, no phone name and no date. A large screen uses more power, so pairing it with a bigger battery makes sense. Brands often pair big screens with big batteries to offer gaming and video use for hours. Most global flagships still use batteries in the 5,000 to 6,000mAh range, so a 12,000mAh cell is roughly double. Even so, this is a plan and not a product.

Capacity is only one part of the story. Bigger batteries tend to add weight, thickness and heat, and the leak says nothing about charging speed. A phone with this battery would also need to stay comfortable to hold, or the extra capacity loses its appeal. Earlier reports said such a battery needs long safety and optimisation tests before it reaches shops, so a launch may still be far away. The mass production claim comes from a single Weibo post and is not confirmed by the company. Treat it as an early signal. Real battery life will only be clear after independent tests.