The Honor Magic V5 just proved its battery is no joke. In a unique endurance stunt, the foldable phone powered elite speed reader Jordan Harry through Marcel Proust’s 4,300-page novel, Remembrance of Things Past, without a recharge.

That’s 30.5 hours of screen-on time reading 1.2 million words — and the phone still had 10% battery left. This is thanks to the V5’s massive 5,820 mAh battery, making it one of the longest-lasting foldables on the market.

Honor Western Europe President Adam Cao says the V5 was designed to eliminate battery anxiety, and this stunt proves it can handle marathons — literary or otherwise — without breaking a sweat.

The Honor Magic V5 is available with 512GB storage and 16GB RAM, priced around $1,489 / €1,999.