Well the last 2 times I used my iGrill, I used the same batteries. The last cook was over 10 hours, and I didn't have any issues with it. Next time I use it I will using my iPad to monitor it. I've been using my iPod.
I also plan to do a side by side test with the iGrill and wGrill
Homemade Offset Reverse Flow Smoker.
Horizon 16" Classic
Burnt up Uniflame cheapy.