I ordered and received a newer version of this battery holder (the one that includes a magnetic charging cable and a rubber pad). I attached them with the included velcro strap over my head on a halo strap. The rubber padding makes it comfortable enough to forget about and also prevents it from slipping around your head. I was concerned that the battery might slip out of the mount as it's a thin battery, but between the rubber circles and the rubberized backing of the velcro straps I feel this is an unreasonable concern. I did not use the included magnetic charger. Cable as I am already using the magnetic connector on my Quest 2 which supports USB 3.1 data transfer (10Gbps) and works for wired communication for PCVR so I can't honestly review the included magnetic charging cable. I didn't have to use the waist belt either (although it was included, I forgot to put it on the table when I was photographing the included accessories). Overall I am very happy with the quality of the holder and feel that it contains everything I need to ensure my external battery pack is secure whilst better balancing the weight of the headset and thanks to the rubber pad provided it fits well on my head, which provides both comfort and stability (because the padding seems to keep the top strap from sliding back and forth under the weight of the battery pack).
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