Hy Dlovell, it's all about chemistry there are basically 3 types of lithium batteries. The simplest ones are the ones that you are looking at - lithium cobalt - that have the most mah or capacity, as far as I know but they get dangerous when there isn't a lot of voltage in them or when you draw too much power. To explain this I'll give an example, when using in a mechanical mod with a low resistance atomizer coil - say 1.5 ohm- you gradually draw more power from the battery as the voltage in it drops. The battery needs voltage to deliver power, so the less voltage it has the more it will work to provide the coil with the same power and if you continue to use this battery below a certain voltage it might heat up to the point that it vents or worse catches fire, explode etc. So the protection in these battery stops the user from using them under certain conditions that the factory decided they are safe to use, e.g they will stop working when voltage reaches a certain level usually 3.2V or when they go through continuous shorts.
There are also lithium iron phosphate that I don't know much about - they are no good for us - and there are the famous and most discussed and used IMR's or lithium manganese which use manganese chemistry as opposed to cobalt and to put it simple they allow to draw more power even at low voltage and also even if the worst happens and they do get stressed to their limits they will always vent, eliminating gases not flames
- which is why they are also called safe chemistry batteries- , but they do this at the expense of having less capacity -or mah- which means that you will be recharging them more often than the simple ones and when you use small imr batteries like 18350 or 14500 that don't exceed 800mah you need to make sure you always have a couple of spares with you when you're out. I hope some of this makes sense, but what I want to say is that people that understand a bit how lithium batteries work will choose to use imr but some will still use protected lithium cobalt batteries in mechanical mods to profit from their higher capacities but they should choose big batteries like 18650 because they will handle stress better just because they are bigger. Anyway with that said if I would have to choose a battery smaller than 18650 I would go for imr for both electronic and mechanical mods just because I can get several of the sizes I need and they last a good amount of time for the money that I pay for them, excluding the fact that you add to your safety.
A lithium ion charger will recharge any lithium rechargeable battery, but get a charger that does it's job correctly and doesn't overcharge. Get an Xtar - vp1 does a perfect charge- ( I still have the wp2 II and have no plans of changing it ) or a Nitecore at worse, trustfires are kind not good at all in my opinion but which ever brand you choose get the newest one. I don't know a lot about the Novice mod but i will check it out since I'm interested in something like that, but if you get it I hope I'll find your opinion on it in here. Welcome to the forum !