I got a Tornado kit plus an extra battery from TW six weeks ago yesterday. I haven't touched any of my mods since so I could get a realistic read on battery life. I had the three
batteries in rotation and for the first five weeks, they were spectacular. One charged battery would last me all day so over the five week period, each battery was charged 12 times. On a couple of occasions, I tried like Hell to drain a battery before going to bed and couldn't do it. During this time period, the batteries seemed to pretty much hold their charges, with performance at the end of the day seemingly equal to performance at the beginning of the day on a fresh charge.
This past week, there has been a noticeable drop off in performance. I've hit the battery cut-off point daily and there is a noticeable decrease in power throughout the day, so vapor production is less. Still, to get a few good hours out of these batteries is excellent compared to the
vaping time realized with a regular 510 battery.
I've ordered four new batteries and will use the ones I have as back ups. If these died today, my daily cost for batteries is approximately $1.50. Considering the excellent, hassle-free
vaping that comes with these batteries, it's a bargain. It has been an adjustment to not have to screw around with charging batteries all day long and keeping track of what battery is where when.
Finally, I've had no issues with sticking battery buttons or anything else. I've taken good care of these things, though they've all been dropped a few times. They have performed flawlessly and exceeded my expectations in every regard. I look forward to the next giant leap forward.