I purchased this one.

https://www.amazon.com/gp/product/B073XYYYWR

There's another model that has two USB inputs, so you could use two power banks or use one and draw more amps.

I was skeptical, and the packaging made me even more so, cardboard & crinkly shrinkly, but I plugged it into my cheapest 5200mah power bank and measured the voltage. 8.8 volts, which is just about right (I've gone as high as 9.2, but prefer not to). Notably, the needle on my trusty voltmeter did not wiggle. Also noteworthy, it didn't seem to need the recommended 3 amp draw. It comes with a 3 amp wall wart if you just want to plug the camera into the mains for power.

It comes with a bog standard dummy battery. The step up converter is tiny, not much thicker than the cable. Plugged in the camera (Panasonic G7) and waited. The 5200mah power bank ran the camera for 156 minutes, or two and one half hours. Not bad--you are going to lose some power in the conversion so don't skimp on the power bank. I'll do some tests later with my RAV 20,000mah bank.

Camera ran cooler than expected.

So there you have it, easy, lightweight power from USB. I had been using 9 volt packs with stacks of Panasonic 18650 cells (runs forever....). But this is really easy.

You can buy adapters for most cameras, and considering the fact that it comes with a dummy battery, the price is cheap. Will it burn out? Interesting question.

[Added formatting and photo, VK]

Specs

• 18 elements in 15 groups, 6 aspherical elements, 3 ED (Extra-low Dispersion)
• 7 blade circular aperture design
• Not parfocal zoom. but in AF mode it can emulate it (how good is uncertain)
• High resolution suited to professional 4K movie production
• Smooth Motion Optics (SMO) design and construction to minimize unwanted focus and image shifts whilst focusing or zooming
• Three separate focus, iris and zoom rings for professional operation
• Optical image stabilization
• Dust and moisture resistance
• $3,500 US price, and somehow 4000 EUR in EU
• Available in November

New registered user but frequent visitor here. My name is Chenxing and I am based in Toronto, Canada. I run a small documentary and commercial production house ( our website). 1 month ago We've got an early shipping of the GH5 and tested in field. Turns out the battery performance is not as good as i hoped (4k with IBIS only last a bit more than 1 hour 20 mins in real world usage.). So 1 month later, now I am in the process of co-designing an enhanced battery grip specifically for GH5 that will be able to at least triple GH5 4k running time, AND optionally output power for more devices.

I am now working with a reputed camera power supply workshop in Beijing, China. We are half-way in the prototype making and expected to have this thing go on KICKSTARTER by the end of May and start shipping around early August.

As you can see in the pictures below, at this time we have finished the 1st prototype with Li-polymer built-in battery, which currently supplies 5500mAh (a standard Panasonic DMW-BLF19 supplies 1860mAh), our not-so-scientific first test suggests that the GH5 camera will continuous run around 9 hours with the grip (4k 422 10bit, Leica 12-60 f2.8-4, on tripod, IBIS abled but it's slacking on tripod.)

But here's the fun part, in the Prototype ii, i am suggesting to implement additional power outputs on the grip. So that the grip will be able to supply 7.4 power to gh5 via dummy battery while simultaneously supply:

• DC 12v (emergency use for most LEDs and some hungrier devices such as BMDCC and BMMCC)
• DC 7.4v (most monitors, recorders, taredek wireless devices can be powered by 7.4v power)
• 5v USB (emergency charging for most smartphones, most Sony α series, and some wierdo small LEDs)

I've got this idea to carry less battery and most importantly, improve the ergonomic of the whole rig (decrease the weight on the top). Essentially it's got most of benefit of using v-mount battery without the weight, size, cost and troubles.

But since this would cost a bit in R&D and implementation. I'd like to ask some questions to help us better make decisions. You opinion is deeply appreciated:

1. Do you think you would buy this battery grip with power output? If so, what do you mostly shoot?
2. Do you think the 3 power output plan meets your need? If it's too much or not enough let me know.
3. Is there any other additional function you really want to add to this battery grip?
4. What is your price range perception for this product.

THANK YOU FOR YOUR PARTICIPATION.

If this product could achieve reasonably well reception we will use the income to design a generic battery grip for all dslr and mirrorless video cameras that can also be used partially as a cheeseplate/halfcage (an optimized and more practical competition to Atomos PowerStation sort of...).

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

• 1x Panasonic DMC-GH2 incl. original accessories (1x DMC-BL12 battery, charger, all cables and manuals, in original box)
• 1x Panasonic H-FS014045 14-45 mm f3.5-5.6, incl. lens hood, lens caps and pouch
• 2x Panasonic DMC-BL12 batteries (in addition to the one in the camera, ie. a total of 3 genuine Panasonic batteries)
• 1x Panasonic DMW-AC8 power adapter (to operate camera off wall outlet in studio or for long-time recording), in original box
• 1x Sandisk Extreme HD Video 32 GB SDHC
• 1x Pixel TW-282 RS1 wired/wireless remote control (e.g. for timelapse recording) with all accessoires, in original box

All of the above has had relatively little use and has been cared for very well. It is therefore in excellent condition.
The camera came originally with the 14-42 mm kit lens, but is on offer here with the sharper and optically better 14-45 mm lens.

Price €480 plus shipping (from EU).

Additional photos available on personal request.

Official name for this product will be: FLEXIOM

Flexible Input Output Manager (or Module) ...

The official website will be http://flexiom.com (under construction).

Support: feha[@]flexiom.com

P-V members will get rebate.

I have decided to make DIY product for Universal DC converter. This unit will allow use of any power source 3-30v as input and max output current will be 2A. The unit consists of voltage converter that gives you adjustable output for example GH2, GH3 8.4 V or any other equipment that is sensitive and requires exact voltage.

Consider this unit as a protection "Layer" between your DSLR and any power unit.

I know there are many ready power solutions already out on the market, but many still struggle and burn/brick their expensive equipment trying different alternative powering sources.

I decided to take my time and make this DIY product as a test but if there is an interest might get as batch production.

The unit will cost a $75 USD + postage (P-V members price). More than 65% of the price to buying needed components the rest a small compensation for research, drill and soldering :-)

For EACH UNIQUE SALE (per member) I will contribute a $10 USD to support P-V !

Product components :

• ABS plastic project box

• Electronics component (The converter)

• DC IN/OUT 5.5x2.5 mm jacks

• Digital Voltmeter (RED) with external switch to check IN voltage, OUT voltage and OFF

Let me know your interest ?

Look like very interesting.

Duration of LED - 50.000h Lighting - 1600LM Lighting distance - 50m Recharging time - 2h Potency - 0,8w – 20w Color Temperature - 3200-5600K Illumination angle - 60º Number of LEDs - 298 Battery Life - Up 10h Price - € 189,99

https://translate.google.com/translate?sl=es&tl=en&js=y&prev=_t&hl=es-419&ie=UTF-8&u=http%3A%2F%2Fwww.xatakafoto.com%2Faccesorios%2Fsi-buscas-un-kit-de-iluminacion-versatil-y-a-buen-precio-echa-un-vistazo-al-power-blade-de-gloxy&edit-text=&act=url

https://translate.google.com/translate?sl=es&tl=en&js=y&prev=_t&hl=es-419&ie=UTF-8&u=http%3A%2F%2Fwww.foto24.com%2Filuminacion%2Fantorchas%2Fgloxy-power-blade-con-mando-de-control-inalambrico.html&edit-text=

https://translate.google.com/translate?hl=es-419&sl=es&tl=en&u=http%3A%2F%2Fwww.tzone.es%2Fgloxy-power-blade-una-luz-led-portatil-para-fotografia-y-video%2F

http://www.aliexpress.com/item/Portable-12V-9V-5V-Li-ion-Rechargeable-Battery-Pack-CCTV-Free-Shipping-FACTORY-DIRECT/543182633.html

Is it good at all and how long does it take to the battery to be recharged completely ?

Thanks to answer

Lens has been barely used. Comes in it's original box. Asking for $250 and that includes insured shipping in the USA. Message me with your email address and I can send photos!

Now, two weeks later, exactly the same problem has happened again. I was walking along taking pictures, I went to turn it on again and.. nothing. It didn't get wet or dropped. I've tried a different battery etc.

Any idea what would cause this twice so quickly? I'm travelling with a number of spare batteries and I'm wondering if it's possible that a discharge from the bad battery could blow the power circuity in the camera? Or is it more likely a bad repair job?

Geared mostly for Canon and Nikon cameras. But with voltage converter can be used for Panasonic also. They are working on improved version.

For use with V mount batteries.

Will be available from time to time at http://www.personal-view.com/talks/discussion/1029/catchit-deals-varavon-day

The sound of this little jewel, built in the well renowned german/austrian AKG house, is superb - very natural and clean, voices sound warm. It has a particular strong directional characteristic/off-axis rejection and wide frequency range. It supports very strong signals as much as it picks up clearly sounds and voices coming from the distance. Reading the reviews you can see how versatil this microphone is http://www.proaudio.com/product_info.php?products_id=3480.

It is very small, 137mm x 9mm, size of a pencil, is very light, perfect for using on any small hybrid or DSLR cameras.

Talking to the AKG tecnicians in Austria, they had their doubts whether it would work with such a low (2.5V) "power supply" of the GH2. Normally it works with 9-52V. But: it did work (Thanks Mr. Amon for your advise).

Connection is: red to "tip" and "ring" and white and ground to "sleeve". Basically the same way as described in @balazers topic. You have to cut off the 48V phantom power plug previously.

The microphone shock mount on the photo, was custom built out of a stainless steel tube, with my local boat-welder in my Marina and a few rubber bands.

The lack of any existing 2.5mm stereo plug in an angled version (I only found crap), made me change the "interor" of an angled 3.5mm plug and substitute it with the interior part of a normal metal 2.5mm plug. Works fine. No need of annoying 3.5/2.5 adapters.

For my purposes this is a very satisfying setup. With the great picture quality of the GH2, using balazers stable cake settings (thanks @Vitaly and @balazer), now I finally found a very small high end on-camera microphone with a wonderful sound quality, no need of any further batteries or power supply, and the whole thing still keeps this small, flexible, moving character which I love to work with.

The AKG C747 is not cheap, the actual version MK II costs around 500€ or more, but the previous version, which is basically the same microphone (a part from a filter and a few other things), you can find it used for around approx 300€, add approx 30€ for the Windscreen.

Would love to hear your opinions about it.

EDIT: Cheap deal on AKG C747 on ebay: http://www.ebay.co.uk/itm/150918575896?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1558.l2649#ht_1249wt_1219

I suspect the magnets but i don't know.

I'll be adding to this topic all suitable solutions that I know.

Some of our deal partners manufacture suitable solutions and I also hope to have them soon on deals in special kits aimed to future BM camera users.

See also

http://www.personal-view.com/talks/discussion/3008/black-magic-is-internal-battery-complete-disaster-or-reliable-solution