Re: SD cards and Batteries
No, not like a laptop at all.
A plug in device the same size/shape as the phone that provides
1. a fold out keyboard with trackpad (because you whinge about onscreen keyboards)
2. extra battery capacity (because you fly 17 hours a day)
3. more storage (because you carry 10,000 hours of video on your person at all times)
4. extra USB ports (because you can)
In the unlikely event that you are only going to the Pub for the evening, you can leave it at home and only take the phone.