Just gathering some more info, and would like to hear from you if you can help please.

Gearing up for a longer-term trial using my iPhone for everything, and see how I feel after another 6 months or so. Usage will include camera, music, GPS (not tracking), for week long hikes or more etc.
In a word (or three)...
1. Which portable battery packs do you prefer for charging your smartphones?
2. Also, what mAh is your charger, and how many charges do you get out of it (roughly...without getting into too much detail about variables and influencing factors etc.)?
I have been trying to track down Anker chargers, but they only seem to sell on Amazon, and do not ship to Aussie addresses (or at least this is what I am finding). So I'm a little stuck, and will also look at locally provided alternatives that have as equally good reputation.
Any advice?
Cheers
Jase