Upgrade your Vr experience with the Sonicgrace S3 Duo Battery Head Strap for Meta Quest 3 and Quest 3S. Designed for comfort and performance, this premium replacement strap delivers faster charging and extended playtime. With 20W super-fast charging, the S3 Duo reduces charging time compared to standard battery straps. The dual 8000mAh swappable battery packs extend playtime by up to 125% for Quest 3 and 150% for Quest 3S, keeping you immersed longer. The magnetic charging dock provides a convenient, cable-free way to store and charge both batteries. Built-in safety protections and Led indicators ensure reliable, worry-free use. Soft memory foam padding, a flexible silicone rear pad, and balanced weight distribution reduce pressure on the face and neck, while the durable adjustment knob delivers a secure, customized fit.