NEWDERY Battery Pack for Meta Quest 3S/3, 10000mAh Hanging Neck Power Bank for Extra 3-5H Playtime, PD Fast Charger for Meta Quest 3S/3/2, Pico 4/4 Pro, HTC Vive, PSVR 2 - White

You’re not finding battery packs that hang on the headset because that’s a bad idea. We want to minimize the weight. This is what I suggest instead and works great for me for past 3 years. https://a.co/d/02rY1re2