I'd get a dual battery mod.
I've used a Spark and an eVic and just couldn't do it.
Even with HG2s the battery life was poop.
If I use smaller coils I could easily run my dual mods all day without changing batteries.
It feels like 40w on a single battery is much harder to do than 80w on 2 batteries.
When I graduated from tootlepoofing to sub-ohm pre-built tanks, I could use my Sigelei 100w all day at 40w or with TC using Ni200 in the Serpent. I stuffed that deck with metal and it could run all day.
It wasn't till I started building massive coils that I needed 3 sets of batteries.
I've used a Spark and an eVic and just couldn't do it.
Even with HG2s the battery life was poop.
If I use smaller coils I could easily run my dual mods all day without changing batteries.
It feels like 40w on a single battery is much harder to do than 80w on 2 batteries.
When I graduated from tootlepoofing to sub-ohm pre-built tanks, I could use my Sigelei 100w all day at 40w or with TC using Ni200 in the Serpent. I stuffed that deck with metal and it could run all day.
It wasn't till I started building massive coils that I needed 3 sets of batteries.