I use a 2amp charger for mine, the 1amp wart that came with my full kit got hot. No issues since I started using the 2amp.
I guess I'm a little impatient, but when I did customer service for Notcigs, RMAs were priority. Here's the response I got a little while ago about giving me store credit for my iStick full kit so that I could order the IPV2 Mini 70w
Hi Debi,
The return has not yet been processed yet but I will note this request along with your RMA for when it is processed.
Regards
101Vape support team