I picked up a used Darwin last week and the battery is not lasting as long as I'd expect based on the few reports I've seen around the web. It seemed like I could expect around a day per charge. I'm getting in the neighborhood of 4-5 hours when vaping between 8.4 and 10.5 watts. I probably take 5-10 tokes a few times an hour.
I'm wondering if my battery is just ready to be replaced. What wattage are you guys using and how long are you getting between charges?