First of all, how long do the batteries that you purchase for them generally last (I am talking about how many charges you get out of them not how long they last for each charge). I already did some research on this topic and know that you are supposed to "marry" the batteries for Dual-Battery Mods and that an amp limit 20 or over is suitable for most vapers, as well as mAh telling you how long the battery can last between charges.
Is there anything else I need to know about mods that I haven't already stated?
Is there anything else I need to know about mods that I haven't already stated?