Yeah the coils will be fine it's just gonna have more of a kick then the .4 coil. Your mod has built in protection that *** majority will not fire anything below .10 ohm for safety reasons. I have to look back at what your mod is but that 0.12 ohm @4.2v @ 50watts is about **21 AMPS** being pulled from your battery (s). Your battles will have ratings of what they can handle for continuous amps and peak Amp.
Like the LG HG2 "chocolate browns" are 3000mah but each cell is rated 20amp continuous and 35amp peak
I'd say best person I know that can break down battery safety, ohms law and what batteries are safe for what type of vaping.
I'd say look up "battery mooch" he was one of the amazing guys we had in the community that did extensive testing on batteries in his profession and went out of his way to help and educate the community. He would make recommendations and stuff in a time that battery malfunction / injury were all over the news. The batteries that were being marketed and sold had were almost always exaggerated claims or just out right lies with a few. It was a bad time. People got hurt and media used it to push fear and promote anti vaping without ever truly explaining what was happening and why.
Sorry didn't realize both replies were from you. So I typed message twice lol. So I deleted one of them so that no one is getting confused. But thank you for all your help.
As far as wattage you can go up or down on the wattage. That's actually one of the really nice parts about rebuildables is the coils will technically last a long time depending on multiple different factors. How you run them. The juice your running. I think the coil I have in my rda right now is like 2 months old and running strong lol. ****I have had to clean it a few times because vape juice has sweeteners that will gum up the coil after awhile***
Thing I forgot to ask. Did you get any tools for building? You will need to cut the leads or the excess wire off of the coil once you bet them mounted to the deck or velocity posts. ***** the coils can not touch each other and the legs of the coils can cause a short pretty quickly if the touch the other coil or the cap of the atomizer.
I'd recommend a coiling tool kit (I have coilmaster mini 2.0 kit just makes things a little easier)
1. You'll need pliers or metal snipps to cut them. (Toenail clippers if in a pinch lol)
2 The wrench that came with the atomizer
3. Scissors to trim cotton
4. "Coil rod" or small screw drivers or drill bits ( this is to fit inside the coil as you secure it down otherwise it deforms messing up the resistance and how it heats up. I think majority of coils sold are 3mm ID so a 1/8th bit or sometimes the coils will have a tool added.
5. Tweezers if you'd like helps