Good to know. However, remember that you have to remember to lock the fire button every time or that safety feature is worthless. This is why I prefer recessed side-fire buttons in my mechanicals.Hey thank you, the mod I have purchased actually has a lock on the bottom fire button, and I have looked at those links before, they were really helpful but I am still blotchy in terms of ohms law/ resistance I would say.

Recessed side fire button of a Silver Bullet
I would recommend a higher end clearomizer for a beginner, over a rebuildable tank or dripper. Much easier for a beginner with so much else to learn. Good to have as a backup device for after you finally get into rebuilding your own coils, too. The Aspire Nautilus is a popular high end clearomizer. They use factory-made replaceable coils.

After researching and you feel you're ready to rebuild, I'd recommend an inexpensive rebuildable drip atomizer, some 28 gauge kanthal wire, and the below tools.
Inexpensive Mechanical Mod & RDA for a Beginning Vaper
Information Resources for Your First RBA
Ohm's Law for Dummies (Vapers)
The Purple Efest batteries are fine, just know that they are generally more expensive than the original cells just for a pretty purple wrapper, and that they over-rate their specs.