Just wondering for what reasons specifically charging via USB is not preferable over a dedicated battery charger. Currently I'm using an aegis Solo with an AW imr 2000mAh battery. Should I just stick to what I've been doing my whole vaping experience and continue to use a dedicated battery charger?
For me, unless it's a DNA device, I'd charge externally when possible. As others pointed out, a good charger will likely treat your batteries better than the cheapest possible circuitry/boards in most mods.
But this thread did take a funny turn. Don't use the usb because it might eventually fail, then you'd have to charge externally? Ummm. That's like saying you should push start your motorcycle (or old manual tran. car), because if you use the battery/ignition system, it might eventually fail, then you'd have to push start it. Not logical. Yeah, it might be better to charge externally, but potential failure of the USB is not a reason to do it.
If that were the only potential pitfall, use it
until it fails, because it's more convenient.
And yeah, usb's seem fragile, but I've never had one fail. I'm sure it happens more often if you're impatient and jam it in there, or stress the connection with the cord.