Second Anna, suggesting an eleaf I stick, specifically the "iStick Power 80 W", it has an internal Lipo battery of 5000 mah capacity.
It has a "menu" button to enter the TC modes. If you ignore this small button, the complex TC settings stay out if way, you use the iStick Power as a simple non-TC mod. The oversized battery will last you a long time; I use it all day with a Nautilus mini, and charge it overnight.
If you want a native non-TC mod, choice is very limited. I can suggest you the Innokin Cool fire 40 Watt, extremely rugged and reliable. Same price of the iStick Power, but the battery is only 2500 mah.