Spotted a pretty decent deal on a foldable solar panel kit at Bunnings and picked one up for myself.
There was about 10 units at the Moorabbin store and is possibly nation wide but I've never had trouble getting Bunnings to price match other stores items on clearance in the past.
The panel is advertised as being 3-6w at 5v, the battery bank as 5000mAh and comes with an AC & car charger.
It's not the greatest foldable panel, but for $20 it's a fantastic kit.