well i would highly recommend getting a mod that uses 18650 batteries and not a mod with a built in battery
the built in battery wears out over time. How long? depends on how much you use it but in general 300 recharges before it stops holding a full charge and its noticeable. I have plenty of these mods in 6 years. and most died on me in 2-3 months. so that was a new mod every few months.
18650s can be had for $5-$9 a piece and chargers are between 10-40 depending on how many slots and how fancy they are. an 18650 last about the same 300 charges or so, maybe more. so thats a lower replacement cost
also using 18650 batteries opens the door to a whole slew of mods on the market.
i currently have 3 mods that use 18650 batteries.
1 is about 6 months old. tehothe ris even older. i bought it used 6 months ago. and one i got for christmas. the 2 older ones work as good as the day i bought them. and in fact since i bought extra sets of batteries...i have a set to use and a set to charge for each mod.... i have yet to replace a battery either.
SO for me getting a mod with replacable batteries is the way to go.
now if you decide to go that route... then just decide on a budget.
right now you can get a whole slew of GREAT devices for under $60 and some even as low as $40 on sale.,
DO not worry about TC. Its there if you decide to use it, but all TC mods work win power mode the same as any other mod. TC has just about become standard on most new mods.
Don't worry if it has 200 w and you only vape at 12w now. YOu may get some new tank or rda or something that willneed 20-40-60-100 watts and then youll have a mod that can handle it if you get a 150-200w mod.
but in all honesty 75ish watts is more then enough to handle almost anything most people buy on the market.
the mods I recommend looking at are
the evic vtc - extremely popular - well built - upgradable software-
koopor plus - dirt cheap - upgradable - not as well built as evic vtc but still a good device - i own one
sig 150 -super well built - not upgradable - very popular - no TC SS mode if you care about that stuff
ipv 3li super well built- built like a tank - upgradable - very popular - no TC SS mode if you care about that stuff - i own one
ipv d2 - well built mine survived a bath in the dish water - has a wierd charging port- not upgradable - can be found dirt cheap now that the D3 is out - no TC SS mode if you care
ipv d3 dont have one its the replacement for the d2 - i would hope its as good as the d2 with an extra 5 watts of power
Smok Xcube 2 - well built - semi popular- uses BT and a phone app - some people are annoyed with the app and so forth but many love this device - you can find threads discussing both the pros and cons of this one.
if your willing to hold off your purchase a month or so 2 new devices are coming out that may be worth looking at, but you should wait for reviews and to find first hand experiences with them
IPV5
Smok 200TC - the preorders are dirt cheap $50ish i think with a tfv4 mini tank included.
plus there are other mods out there that are good. this list is just the ones i have used, seen, or heard so much about I fell I know alot about them.