Sonicgrace S3 Pro Battery Head Strap for Meta Quest 3 and Quest 3S, 20W Fast Charging with Magnetic Battery Pack, Comfort VR Headset Strap Replacement Accessories

I use the S3 Pro head strap. It fast charges the headset, and it actually gains charge during use. I use a fast charging link cable when I do longer sessions or when I don't want to use the battery for whatever reason. For the S3 Pro, you charge it back up with the original charger or one with the same specs.