I looked through the current threads and did not see much info about this. If I missed it, can someone please point me in that direction and then Vitaliy can close this thread.

Edit: Also, do you need to have matching capacity batteries on these 312 LED lights? And do the two batteries run in a series or in parallel - essentially do they increase the voltage by having two, or simply extend the run time?

Thanks!

I'm also wondering how I can prevent this from happening again. I was shooting 4K 10-bit 23.976fps using a Lexar U3 150 mb/s SD card with 128GB of storage (I had used 122gb by the end of the take, and had a few gigs to spare.) I was also using a 3rd party battery by Newmowa, but it had plenty of charge remaining.

Thanks for reading! Any leads at all would be hugely appreciated.

I use a lot of the BLC12 Batteries. I buy the Panasonic ones; they aren't cheap but they last the longest and don't turn the camera off with no warning.
However, I do buy aftermarket batteries for testing from time to time. They often have very high ratings, and they never work very well.
A few years ago, I bought the DSTE "1600mah" battery. It had about 70 percent of the stock battery's power, and the stock battery is 1200 mah. So that's 840mah, or about half the advertised capacity.
A few weeks ago, I purchased the 1700 mah version at this link:
https://www.amazon.com/dp/B00MEAMBQU
It weighs 55 gm as opposed to the stock 50gm. Previous clones weighed 46 and 48 gm.
Now before you get excited, the extra weight is probably ballast, since you can't squeeze more cells into a battery, as a general rule.
However, after extensive testing, this battery is equal to--not better--but equal to stock. The only difference is that the shutdown curve is a bit steeper.
So it isn't "1700" mah, but it is basically a stock battery.
This was quite a shock, but I repeated the tests several times. In one test, I simply turn on the camera and record video until the battery croaks, and measure the time. Both the stock battery and the DSTE run the G7 for two hours of video, sometimes a few minutes more, sometimes a few minutes less. So, finally, an inexpensive option. At least for this batch. Also, see my post on the cheap external battery that will run your camera all day.

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]

Photo

Manufacturer specs

• 91Wh capacity
• 620g
• 25.4mm depth
• 12V cutoff voltage

Thermal behavior

Start

Depleted battery

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...).

If you are using an external battery solution successfully, what do you have?

I didn't have much time to check out the gh4 so far, a lot of work hinders me, going too far into research for each little thing myself, that's why I hoped I could get a little support from you hear. Mostly I'll record video and sound on myself at the same time, not sure if I'll have an assistant from time to time. My idea until now is to record in 4k, maybe in 24fps should be alright I guess. The shooting will be for a 5 video monitor/large flat screen panels installation.

My equipment so far: GH4 with kit lens 12-35mm

• Voigtlander Nocton 17.5mm 0.95f with UV and ND filters
• Voigtlander Nocton 42.5mm 0.95f with UV and ND filters
• One SD card SanDisk Extreme Pro 32GB 280 MB/s (I'll have another one like that)
• only one battery so far
• trolley case

I'll definitely need a second battery or the battery grip, is it a good thing to have?

• Sound Recording device
• Microphone (one or two? maybe too much to handle!)

• Wind jammer (boom?)

• Any experiences with 'Rycote Zoom H5 Audio Kit' or 'Tascam DR-60DmkII 4-Channel Portable Recorder with Rode NTG2 Condenser Shotgun Mic Kit'?

• Tripod mainly to use as proper stand in any condition, not sure if I'll need a very heavy one for doing pans?

• Rig / steady cam? I actually would prefer shooting with a rig/steady cam to make pans with a heavy tripod. Follow focus! Which one?

• A super-portable extra light like dedo light!

• SSD discs for backups?

• A Mattebox?

And everything should be of proper quality, lightweight one-person-solutions, possible to get through the airports O.K..

Thanks, I appreciate your hints, ideas, experiences and comments ! kolinko

All boxed with all accessories as per original package. The only thing that I have misplaced is the eyecup. I can post pictures if anyone is interested.

Looking for £750 plus postage of your choice at cost. Bank transfer preferred. I'm in the North East of Scotland if pick up is preferred!

Thanks!

NEW. NOT OPEN. NEVER USED €160

1) Two MXL FR-300 shotgun mics: Very good mics with hot signal and low noise floor. Super cardioid pattern, phantom power and XLR connector.

Technical specifications:

• Capsule Size: 14mm
• Length: 10"
• Frequency Response: 50Hz-18kHz
• Sensitivity: 45mV/Pa
• Impedance: 100ohms
• Max SPL: 123db
• Signal to Noise Ratio: 75dB
• Operating Voltage: 9-52V

Nearly mint condition, windscreen and original box. Asking 100 EUR per mic + shipping.

2) One dual V-mount charger: Good and fast charger for V-mount Li-Ion batteries. It can charge two V-mount Li-Ion batteries simultaneously with up to 3A (an empty 90Wh battery takes about 2 hours). The intelligent charging electronics chooses automatically between constant voltage or constant current mode to charge every battery optimally. The state of every battery is indicated individually (charging: red LED, finished: green LED).

Due to its compact form factor, its low weight and the handy handle, it is well suited for mobile operation. Its fold-out foot keeps it steady. Additionally it can be used as a DC power supply. Up to 60W are provided via a XLR 4-pin socket on the backside for video lights, camcorders,...

Technical specifications:

• Interface: Sony V-mount
• Input: AC 90-240V, 47-63Hz
• Plug: "rubber connector"
• Switch: charge/off/DC-output
• Output(charging): 16,8V, 3A
• Output(DC-output): 15V, 4A
• Socket: XLR-4-pin
• Temperature: -10°C - +40°C
• Dimensions: 140(L) x 100(B) x 240(H) mm
• Weight: 950g

Only selling it because I got a 4 channel charger;-) Nearly mint condition, power cord included. Asking 130 EUR + shipping.

All items are located in Germany - will ship world wide.

Any questions -> please ask.

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

Straight out of the box the following works;-

1 x IDX C-EBXLR Endura Individual Power System - One V-Mount Adapter Plate with 4-pin XLR Connector

1 x IDX CA-4XLR 4-pin XLR Male to 4-pin XLR Female Cable extension cable

1 x CUE 75 LI-ion Battery (XLR connector plus extra D Type adapter for powering other devices) or longer duration DUO 95 (which features extra two 'D Type' Power Outputs to power other devices plus a powered USB Out too!)

1 x IDX LI-ion Battery charger (for example the VLP PC1 single charger )

Lookout for a full report and video over the weekend regarding maximum recording times with fully charged batteries of the CUE 75 and DUO 95 packs.

$650 shipped in the U.S.

1 - batteries are usually higher than stated, so maybe 8.8v? 2 - voltage regulator in line? 3 - dc coupler with 9v fuse? ubec at 9v

http://www.ebay.co.uk/itm/8-4V-18000mAh-Battery-Pack-CREE-XML-T6-U2-LED-Headlight-Bike-Head-Light-Lamp-/271453580433?pt=UK_SportsLeisure_Camping_LightsLanternsTorches&hash=item3f33e4ec91

I'm pretty sure all the Patona chargers for lumix G camera have that option.

• Samsung SDI Battery Cell
• Can Choose 7.4V, 8.4V, 12V Output Power / 10,400mAh High Capacity
• Can Use Dual Voltage Outputs, 8.4V and One out of 7.4V, 8.4V and 12V at the Same Time
• $220 shipped

Price: see above
Shipping: Includes free shipping for US/Canada/UK/Australia&NZ/Western Europe. Contact for other regions.
How to buy this thing....

Seems like a more cost-effective alternative to the Switronix PB70 for those looking to power a camera and monitor from the same source, but I haven't seen anything written about this yet. Has anyone used one?

Would prefer EU sale, but will consider further afield.

Payment via bank transfer preferred. Will accept Paypal but will add £20 to cost.

Panasonic gh3, mint condition, no signs of use, original box

Panasonic 12-35mm f2.8, mint condition, no signs of use, original box

Genuine battery grip, mint condition, original box

fotodiox adapter m42 to m4/3

1 extra genuine panasonic battery

1 variable nd filter light craft workshop 58mm

1 step up ring 49mm to 58mm

16GB sdhc class 10 transcend memory card

exakta 70-210mm f4 pk mount

All intems in great condition, located in portugal.

Only selling the full package.

2000€