10,000mAh Phones Are Here: Silicon-Carbon Batteries Explained
By Sidra Salman · October 24, 2026 Two phone makers are about to do something that sounded absurd three years ago: ship mainstream smartphones with 10,000mAh batteries. Redmi's K100 launches in China on October 27, and Vivo's Y600 follows on October 30 — seven days apart, both packing double the capacity of the phone in your pocket right now. This isn't a spec-sheet gimmick. It's the payoff of a battery chemistry shift that quietly rewrote what's possible inside a phone. Here's what's launching, how silicon-carbon batteries actually work, and what 10,000mAh really buys you in daily life. The launches: what's confirmed and what's still rumor Redmi K100 — launching October 27 in China. Xiaomi has confirmed this will be its first phone with a 10,000mAh battery, built on what the company calls its Jinshajiang battery technology. The published details are unusually specific: a 28% silicon-carbon content in the anode, an energy density of 957Wh/L, a...