buddah

Complete noob, first mod. Love it. Installed 3 fresh 3.7v 3000mah lg brown batteries Friday 1\13\17 , and still going strong this morning Sunday the 15, checked them threw USB there still at 3.4 on all 3 batteries. Love the battery life. Only thing that erks me is the battery icon showed empty Saturday morning. Is there a fix for this? Do I change batteries when icon is empty? Or vape till I get a low battery message? I vape at 40w. Any info or help is greatly appreciated. Try all