Meanwhile, I have several controllable batteries, including the Vapros nunchaku, the Eleaf Istick 50W, the SMOK Pro M65 and some more. The Eleaf Istick 30W is but for the following reasons my favorite Battery: It is not as big and heavy as the Eleaf Istick 50W (more for men), is through the round design as opposed to SMOK Pro incredibly comfortable to hold and is Suitable as opposed to nunchaku, which is my second favorite, even for sub Ohm evaporator. The display is very readable. The settings are very easy and all buttons can be locked to prevent accidental changes in use or transport. It is super stable on the table and not fall so easily to such. As the nunchaku. Ideal for the office. Perfect it would be if the USB charging socket instead of the bottom, on the side would like the nunchaku. I use it together with the KangerTech subtank Nano and the Aspire Nautilus Mini. I own 2 of them now and can recommend it highly enough.