1 x 10.000mA/h, when its empty its empty, sure there will be a nice bar or restaurant on the way, a bottle of wine, a nice meal, and a plug where to charge the battery pack.
I prefer my 20000Ma/h. It will over 4 days and all my devices, so I don't need to worry about finding somewhere to top up if I can't (some places can be a bit funny in the UK about you using their sockets. It's not many, but I've had it happen).