There are a lot of hurdles to clear before smart glasses go fully mainstream, but one of the biggest is battery life. If you’re spending upwards of $500 on a gadget (one that’s more of an accessory than a full-blown computer), you’re going to want to wear it all day. You will not, however, want to wear a device with a battery that’s actually big and heavy enough to last all day.

Alibaba, for its part in the smart glasses conversation, has devised its own solution to that problem: swappable batteries. Its new Quark AI Glasses S1 , which are now available on all of China’s major e-commerce platforms, do something I’ve yet to see in a pair of smart glasses by including easily interchangeable rechargeable batteries. With an additional battery pack, Alibaba promises up to 24 hours of us

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