Smartphone users could soon charge their devices just once a week as Honor and Vivo test silicon-carbon batteries with capacities reaching 15,000 mAh.
Two major Chinese manufacturers are developing ultra-high-capacity power cells designed to break current industry limits without drastically increasing device thickness. Disway reported that Honor is currently testing batteries between 14,000 and 15,000 mAh in production trials. Meanwhile, TIMES Indonesia noted that the company is utilizing high-density energy designs to keep the chassis slim.
Honor aims to match the slim profile of current flagship devices while housing a power source nearly three times larger than standard market averages, with the prototype testing keeping the thickness within that of an iPhone 17 Pro measuring 8.75 mm. Gizchina revealed that these prototypes challenge traditional smartphone manufacturing limits.
The company previously introduced the Magic 9 Pro Max with an 8,800 mAh battery rated for three days of use, alongside the X80 Pro Max featuring an 11,000 mAh cell that lasted 26 hours in continuous live streaming tests, Disway reported. Previous models also include the Honor Win RT 2 and Win Turbo 2 with 12,070 mAh batteries.
Vivo Enters Production With 12,000 mAh Devices
Vivo has also entered the production phase for a new smartphone equipped with a 12,000 mAh battery, CNBC Indonesia reported. Perangkat Vivo Y600 sendiri sempat memecahkan rekor untuk siaran langsung tanpa henti selama lebih dari 32 jam hanya dalam sekali pengisian daya, dengan baterai berkapasitas 10.000 mAh.

In a related development reported by Jagat Review, tipster Digital Chat Station indicated that Honor is preparing its first wide-screen smartphone featuring a 6.39-inch display, a Snapdragon chipset, and a 200-megapixel triple camera setup with a periscope lens. This device will feature a battery larger than 8,000 mAh, surpassing the Huawei Pura X View which has a 6.39-inch OLED display with a 16:9.5 aspect ratio and a 7,000 mAh battery.
Silicon Carbon Technology Drives the Shift
Western manufacturers have been slower to adopt the trend, though American producer Motorola has started integrating the technology into its Signature 27 series to achieve 77 hours of battery life on a single charge.

Questions about week-long smartphone batteries
Which brands are developing week-long smartphone batteries?
Honor and Vivo are currently developing and testing ultra-high-capacity batteries ranging from 12,000 mAh to 15,000 mAh, CNBC Indonesia reported.
What specific technology enables these massive smartphone batteries?
Manufacturers utilize high-density silicon-carbon battery designs to increase energy storage while maintaining thin device profiles, Phone Arena noted.
Have release dates or specific model names been confirmed?
Neither Honor nor Vivo has announced official release dates, official pricing, or the final commercial names for these high-capacity smartphones.