like, to be clear: the scope of the article is laid out by those qualifiers, so naturally it’s not going to prescribe how to get rid of in-built batteries in consumer electronics since they fall outside of that scope. even so, it addressed the quibble you’re getting at here pretty bluntly, i think:

Of course, outsourcing chemical energy storage to the device is not the most sustainable option. The production of lithium-ion batteries requires fossil fuels, and (unlike lead-acid batteries) they are not recycled. The best solution, of course, is to reduce the use of electrical devices. But charging them with direct solar energy is a lot more sustainable and efficient than via other batteries or a fossil-fueled electricity grid. If we use high-tech devices, then preferably in the smartest way possible.

and Low-Tech Magazine has previously covered alternatives to battery technology in other posts. so i’m just not seeing what the objection here is.