This is a loaded question the answer to which will heavily depend on what type of coil you are using and it's resistance. We have put together an extensive Tutorial section where you can learn more about Best Batteries for Mods and Vaping Safety. We strongly recommend familiarizing your self with this information.
Here are the 3 most important things to remember:
- AMP limits will dictate which battery would be best for a specific resistance coil.
- Sub-Ohm vaping will require a high amperage rating.
- mAh is the measure of battery's life (capacity). All day vaping will require a larger battery.