12,000mAh phones have arrived with Honor and OPPO leading the pack

Honor already sells two phones with batteries bigger than 12,000mAh. The WIN RT2 and the WIN Turbo2, two gaming phones, both carry a 12,070mAh cell, and Honor launched both in China on 21st October 2026. List prices there start at about USD 520 or KES 68,000 for the Turbo2 and about USD 670 or KES 88,000 for the RT2.

When we ranked the biggest phone batteries at the end of August, the biggest in an ordinary phone was 11,000mAh. Oppo is next, and a 12,000mAh-class cell said to be vivo’s is in mass production. If you’re tired of carrying a power bank, you’ll want to know how a battery this big fits in a phone, and whether one will be sold here.

How a 12,000mAh battery fits in a phone

A normal phone battery stores lithium in a graphite anode, the part of the battery that holds the charge, and graphite can only hold so much lithium in a given space. Silicon holds far more, so makers mix it into the anode. The problem is that silicon swells as it charges, which cracks the anode and wears the battery out early. Makers get round that by setting the silicon inside a carbon structure that absorbs the swelling, and that’s why these are called silicon-carbon batteries. Honor says the WIN RT2 uses nano-sized spherical silicon to raise energy density and make the cell last longer.

That’s how Honor fits 12,070mAh into a body 8.5mm thick. The RT2 weighs about 238g and the Turbo2 about 235g, but the battery isn’t the only reason they’re heavy. The WIN2, the most expensive phone in the same range, has a smaller 10,100mAh battery and still weighs 237g, while the 11,000mAh Honor X80 Pro Max, an ordinary mid-range phone, weighs 203g. We think the gaming hardware adds as much weight as the extra capacity.

Phone batteries carry two numbers, and they explain the odd figures in leaks. The typical capacity is the average a batch of cells delivers, and it’s the number makers advertise. The rated capacity is the minimum the maker guarantees, so it’s lower. Honor’s 12,070mAh cell is rated at 11,790mAh. When you compare two phones, compare typical with typical. Neither number is battery life. In the 32-phone battery test we covered this week, the 5,567mAh iPhone 18 Pro Max beat the 7,300mAh OnePlus 15. How long a phone lasts also depends on how fast its screen, chip and modem use the charge.

OPPO, vivo and Honor’s next battery

Oppo’s phone is the PNC110. It got its Chinese network licence on 3rd November 2026, which lists a 5G phone with two SIM slots, Android 17 and a battery rated at 11,640mAh. Oppo’s A7 Pro Max is sold as 10,000mAh with a 9,700mAh rating, a 3% gap. The same gap puts 11,640mAh at about 12,000mAh, so we think the PNC110 will be sold as a 12,000mAh phone. The licence names no chip or screen size. A Chinese leaker posted on 11th November 2026 that an Oppo A7 Ultra is due around December and may be this phone. Oppo hasn’t confirmed the name or the date.

The same leaker says a maker taken to be vivo, or its iQOO brand, has a 12,000mAh-plus cell rated at 11,970mAh in mass production. The leaker didn’t name the phone it goes into, and vivo hasn’t confirmed it. Earlier this month the leaker also said Honor is testing 14,000mAh to 15,000mAh batteries, aimed at charging once a week.

Will a 12,000mAh phone come to Kenya?

Honor hasn’t announced the WIN2, RT2 or Turbo2 outside China, and its global site has no page for any of them. An earlier Honor big-battery phone did travel, though. The X9e Pro kept its 11,000mAh battery on Honor’s global page, and Avechi sells it here for about KES 55,000. We wrote about it ahead of its Malaysian launch in September.

Not every phone keeps its battery when it leaves China. Oppo’s A7 Pro Max went on sale in Austria, Malaysia and Thailand with the full 10,000mAh battery. Xiaomi’s Redmi Note 17 Pro Max drops from 10,000mAh to 9,210mAh in Europe, and the Poco F9 Ultra from Xiaomi’s Poco brand, carries 8,050mAh against 9,070mAh in the Redmi K100 Pro Max it’s built from. Xiaomi hasn’t given a reason for either. So if you import a big-battery phone, check the capacity on the spec page for the market it comes from, not the Chinese launch figure.

We think the Oppo is the 12,000mAh phone most likely to be sold beyond China. If the PNC110 is the A7 Ultra, it joins a line Oppo already sells abroad, and the A7 Pro Max kept its full battery when it went abroad.