Advice for Nepal, Annapurna Circuit

I need some advice for Nepal. I am going to do the Annapurna Circuit in Nepal and would like to hear any advice you have including equipment choices. I will have a porter so I will only be carrying a day pack. I have to get the porter a pack and was just thinking of a basic cheap one (which would also have to be my travel bag for the rest of the trip). I don't think my regular AARN pack would be suitable, I have enough trouble adjusting it myself. I would be carrying a day pack. The trek would be in November. I will be stating in guest houses. I will also need to carry my own power for charging camera and possible other devices. I was thinking of a couple of 10,000 or 20,000 mAH USB battery packs and charge those whenever I can. Also, for my GPS I was thinking of taking a bulk pack of 30 AA alkaline batteries which I would use 2 at a time. Do you think these batteries and packs would cause any issues for air travel or through security checks? I was going to carry a good supply of water purification tabs.