The BOBOVR P4U Battery Strap transforms your Pico 4 Ultra experience with an innovative power solution that combines extended battery life, user-friendly design, and superior comfort. This advanced head strap system seamlessly integrates power management with ergonomic support, making it the ideal choice for both casual users and VR enthusiasts seeking longer, more immersive sessions. High-Capacity B100 Battery System The B100 battery system delivers a total capacity of 10,000mAh (5000mAh × 2 cells), extending your Pico 4 Ultra usage time by 120%. This means more time for your VR experience without interruption. Magnetic Hot-Swappable Design With magnetic attachment and 22.5W fast-charging support, you can easily swap batteries without powering off your device. This design ensures continuous VR sessions while keeping spare batteries charged and ready. Bottom-lit Battery Indicator A unique lighting system illuminates the battery from below, with different lighting states indicating battery levels: Steady Light - Battery Full Blinking - Low Battery No Light - Battery Depleted This intuitive design allows you to instantly check battery status - particularly convenient when managing multiple batteries. Comfortable Head Support The enlarged memory foam cushion and improved top strap work together to distribute weight evenly across your head. This design ensures comfort during long VR sessions while reducing neck strain. Complete B100 Charging Solution Compatible with the BD3 charging dock for efficient battery management. Keep spare batteries charging while using your headset - perfect for both home use and commercial applications.