It's just a safety thing - the
batteries CAN fail, the chargers CAN overcharge...so it's better to be there while it's charging just in case.
Just a couple key points on earlier questions:
I just set aside 2 batteries like yours that lasted about 9 months. They're not DEAD, but they don't hold a charge as long as they used to...
I still use clearomizers that are the first ones I got. You keep replacing the "coil" inside.
You'll want to buy a box of those - or start learning about "rebuilding" them with wire and wick.
The
coils can last a few days, or a month - depends how much you vape, it even depends on the
juice you use. It probably depends on what kind of a day the kid who put it together in China was having at the time.
I clean mine ever few tankfuls, but only with hot water - and they last a pretty long time. I have a BUNCH of different toppers though - I don't vape on just one all day, I rotate a few devices and juices!