Price: $23.35 with free shipping

http://www.ebay.com/itm/DMW-AC8-DMW-DCC8-DC-Coupler-AC-Power-Adapter-for-Panasonic-Lumix-DMC-GH2-GH2H-/220950905405

(The output voltage is easy adjustable from 2-24v /2A , when you open the box, so you can trim it for GH4 to 9V)

The integrated cable attaches directly to DC coupler (Genuine one, tested).

These have constant and secure voltage of 8.5v, that works on most Lumix cameras. input is 5.5x2.5 mm jack ...

Use any power source 3-30v without fear ...

Price for both 50 euro + postage. Price for each 30 euro + postage.

Selling this as I have no longer GH3 ...

Items will be sent from Sweden. Postage costs about 10 euro within EU

Electronics shop open today but not tomorrow, closes at 5pm today (1:36pm as of writing), I'll get there about 45 min before it closes (currently at work).

Not a huge lot of options. But I'm going to see if I can rig up a simple voltage regulator based on zener diodes and a resistor with 10x AA Eneloop XX's (just under 14.3v total at full charge voltage iirc). They dont have a large variety, the best looks like a 9.1v 1watt zeneor diode, producing a maximum current of 110ma by the looks of it, so I'll stick a bunch in parallel to raise the maximum current output.

The question is, how much max current do I need for powering the GH2? Just need an emergency option without over-volting the camera (what is the highest safe voltage btw? Eneloop XX's provide very stable voltage for what they are).

Otherwise one option is to power regular with regular Eneloops, from testing, high current draw, the voltage sag is minimal, and stable over it's capacity.

In Melbourne CBD, Australia if someone has an alternative thats open till 5pm today

edit: Just read you can't easily put zener diodes in parallel.. well this is annoying