Well, let me rephrase: I just think charging with a good charger is a little better than charging through the USB. I don't love vaping via passthrough with 18650s, personally. I don't vape often through passthrough at all, actually, but in that case if you're OK with letting it sit while charging then it's fine. Having a charger mostly allows you to get fresh batteries, if you can afford backup. I wouldn't personally recommend a Chinese no-name charger when you can get a slightly older version Nitecore for $14.00, and I'm sure other well-trusted brands for similar or less. It's just a personal preference. There's nothing inherently wrong with charging via the USB, but I prefer using a separate charger for both practical and safety reasons and I stand by my suggestion.
Charging by USB is fine, though, and saves money.
Charging by USB is fine, though, and saves money.