India, June 10 -- Right now, every smartphone manufacturer is in the same battle, and it's not about cameras or about displays, it's about battery life. Redmi may have taken one of the biggest swings yet in the battery life smartphone race. But there's a feature in the Redmi Turbo 5 Max spec sheet that's altering the very definition of a smartphone.

Xiaomi CEO Lei Jun revealed that the Redmi Turbo 5 Max is powered by a 9,000mAh Jinshajiang battery, which has a record energy density of 894 Wh/L for Xiaomi. Xiaomi claims the Redmi Turbo 5 Max lasted 43 minutes longer than a rival smartphone equipped with a 10,000mAh battery during internal testing. The most important part of this story that is not discussed is energy density. The Redmi Tur...