Just got a Vamo and AW 18650 imr batt. The Vamo is reading Lo V which I assume means dead battery. However I charged it last night and used it only a bit today. Is there something wrong here? I should ve getting more time on my mod with a 2000mah batt I would think. I have been running it around 4.0 - 4.3 V or in watt mode at 7.0 watts on a 2.4 ohm coil. Any help is appreciated. Thanks 