On a recent trip to Montana, I decided to take my portable POTA activation backpack. This kit has everything I need to do an activation.
One of the biggest equipment challenges was the battery. When at home, I use a 20 or 30Ah lithium iron (LiFePO4) battery in my battery boxes. I also have a non-boxed 10Ah LiFePO4 battery I use when I go super lightweight.
I have avoided using the popular Bioenno batteries because of their high cost (a 12Ah battery costs $157).
Instead, I use the Eco-Worthy LiFePO4 line of batteries. They are rugged, reliable, small, amazingly lightweight, and affordable. I have been using them for years without a single problem.
When planning my trip, I discovered the TSA has changed the rules on the lithium batteries you can carry onboard an aircraft. Passengers are now limited to a maximum of 100Wh per battery.