Yeah, but XTAL 3 MR has zero standalone capabilities and requires being tethered to a rather beefy PC to function at all.
From their own page, the very minimum requirements for the PC are 32GB RAM and an RTX2060 GPU. And that’s a minimum, so I am not sure how well it functions with those specs.
That battery pack is nothing in terms of weight compared to the type of a rig needed to support XTAL 3 MR headset. I can put the Vision Pro battery pack in my pocket, but I would struggle to fit the rig for XTAL in a backpack.
Just the lightest GPU listed in the minimum requirements (RTX2060) is around 950g[0], while Vision Pro battery pack is ~350g. Add to that a motherboard (being able to support that GPU and a i7/i9 CPU and 32GB of RAM), a CPU fan, and a 500W (probably could get away with less, but i decided to be safe) power supply being around 3.9lb(~1.7kg)[1].
Even without accounting for the motherboard, desktop case, and CPU fan weight at all (which can vary significantly and are pretty heavy compared to the rest of the components) and counting them as a zero, you have already crossed into the 3.6kg territory. With those accounted for, you are crossing into the 5kg territory easily. And if you decide to go beyond minimum specs for GPU, I would expect it to be even worse. And the size of that monstrosity would be rather significant too.
I think comparing that to the weight and size of the Vision Pro battery pack is not that good of a comparison at all.
P.S. I am aware that there is a noticeable variation in weight of GPUs depending on the manufacturer and the specific variant for any given model, as well as for motherboard/cpu fan/power supply. However, that would not change the overall conclusion at all, as there is exactly zero way you would be able to get the build below 3kg. And I am being extremely generous here, as my estimate is very likely below even the lowest real-life lower-bound estimate.
