4901 hasn't used any devices for scouting (yet...), but one thing I can recommend personally:
Anker battery packs to keep them topped up. I bought an
Astro E4 before my trip to IRI this year, and made it from arrival Friday to on the train home Sunday morning without having to plug it into a wall--and my iPhone was never in danger of going dead despite using it a lot for work and despite the notoriously bad reception in Lawrence North that makes the phone use more juice to connect. They have also nailed down talking to the phone for the fastest charge it will take, which lets you top up quickly. I paid $30 for mine, but obviously a team wanting to charge a fleet of them might go for something bigger still. (The new
PowerCore 20100 trumps my 13000 mAh for 20000 for $10 more, for example, or the
three-port Astro E7 has 26800 for $70.)
I'm also a fan of their
PowerPort line if you have access to wall power or wanted to charge everything up overnight in the pits or hotel. They've got four-, five-, six-, and ten-port versions that should give everyone the juice they require.
I'm nothing but a very satisfied customer--their stuff is well-built and a great bang for the buck.
