it's getting time to buy a new mod. Last time I bought a Vaporesso Attitude that uses as a battery one replaceable 18650 battery. And you can charge the battery inside the mod via USB. Now, I thought that would be the best of both worlds. Because I could either change the battery while it's inside the mod via USB or I could just change the battery. But the thing is, when I charge the mod via USB, the battery doesn't seem to last nearly as long as when I just replace the battery. Are pretty much all mods that take replaceable batteries but can also be charged via USB like that? You're much better off just replacing the battery and not charging via USB? For my lifestyle, I've already got USB chargers all over the place my my phone and tablet, so I'm no doubt better off for day to day use with a mod that charges via USB. And if the mods that take replaceable batteries don't charge very well off USB, I'm probably better off with a mod with an internal battery.