Replaceable Battery Design Featuring a new battery architecture that separates the discharge module from the battery pack. This reduces heat generation and improves discharge efficiency by 6%, with added low-battery audio alerts and accurate battery level display Enhanced B100 Battery System Equipped with the all-new B100 battery system, the capacity has increased by 92%, from 5200mAh to 10000mAh, while the weight is only 28% higher Built-in Head Cooling System The integrated head cooling system uses silent technology to keep your face and head cool and comfortable, even during extended VR sessions. Enjoy 100 levels of adjustable wind speed for personalized comfort Optimized Comfort for Reclining The redesigned rear structure eliminates protruding adjustment knobs, offering a flatter design for enhanced comfort when reclining or lying on a sofa Zero Facial Pressure Designed with a honeycomb pad, the head strap improves grip and stability, ensuring no facial pressure during high-intensity gaming Tailored for Active Gaming Specifically engineered for Quest 3S/Quest 3, this head strap enhances comfort and performance for immersive gaming sessions Note: To achieve more compatibility in the future, we use a newer battery system, so B2 and B100 cannot work interchangeably. The air conditioning system requires B100 to work.