Series CoreBook X. Manufacturer ‎CHUWI. 1 x CoreBook X (8+512G) Laptop. RAM Size 16 GB. Portability and Battery Life: With a slim profile of only 20mm and weighing 3.84 lbs, combined with a long-life 41 Wh Li-ion battery supporting up to 9 hours of use, this laptop balances portability with sufficient battery life for on-the-go users.