Hi. I have a dna 40 26650 hand made mod batteries ijoy and i have the same problem with weak battery warning from the middle of the battery bar. The modder explain to me that is caused beacause of the ohm law. My set up is 40mm wire kanthal a, 0,6-0,7 ohm and i vape at 22-24 watt. With the same setcup i vape normally in other mods but in the dna40 i have the weak battery warning and the strength of battery falls down from the middle of the bar. Thecmoder also told me that i must vape at 16 watt with 0,5 ohm setup to avoid the warning. But i cant satisfy the vaping in these watts. What can i do? Thanx