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> Really though I miss the old old days when you could get an ultrabay battery. What do I need in a laptop more than storage? Battery life. I had a Fujitsu Lifebook which had an "ultrabay" (their version of it, at least) and that was the feature I used most for it.

Well, nowadays you can get a power bank with Power Delivery and charge your laptop via USB-C port

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It’s a nice idea on paper, but I don’t think there are many power banks that support 100W+ discharge.

Moreover, that’s a relatively recent technology and there was a good decade (or more) between the point when bay batteries disappeared and usb-c charging became any sort of commonplace occurrence outside Apple products.

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