BMPCC 6K - External battery bank

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Joshua_G

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BMPCC 6K - External battery bank

PostTue Jun 30, 2020 6:49 pm

1. Have anyone tried this External battery bank, or similar one:
https://www.ebay.com/itm/External-Batte ... SwTqtd3NqS

2. Is the External Power In socket and wiring the same in BMPCC 4K and 6K?
DaVinci Resolve Studio/Windows 10 Pro x64/AMD 1920X/32GB RAM/RX Vega56 8G.
BMPCC 6K.
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Mark Foster

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Re: BMPCC 6K - External battery bank

PostTue Jun 30, 2020 7:03 pm

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Joshua_G

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Re: BMPCC 6K - External battery bank

PostTue Jun 30, 2020 8:23 pm

Thanks, however NPF batteries don't have 12V, so what's the catch?
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Ellory Yu

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Re: BMPCC 6K - External battery bank

PostTue Jun 30, 2020 11:55 pm

There are many battery solutions out there but the rigging and setups are pretty odd. Most of them will have some cautionary statement from user experience. I've been using the Core Edge solution which is fine with my own cautionary statement from experience as posted in this thread:

viewtopic.php?f=2&t=114244&p=629719&hilit=core+edge#p629719

Then other than the BMD Battery grip solution, there is a knock off version for $50 that seem to last close to 3 hours reported in this thread:

viewtopic.php?f=2&t=114471
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Dmitry Shijan

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Re: BMPCC 6K - External battery bank

PostWed Jul 01, 2020 12:14 pm

For P6K 50Wh battery probably not too effective and you need at least 100Wh V-Mount brick to power camera for few hours. But i still can offer 18650 battery enclosure. it was designed specially for BMMCC, but same time works well with any other device
viewtopic.php?f=2&t=71520&start=50#p511717
https://lavky.com/handmade/home-and-hob ... t=UW590888

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All my custom made accessories for BMMCC/BMMSC now available here https://lavky.com/radioproektor/
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Dmitry Shijan

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Re: BMPCC 6K - External battery bank

PostThu Jul 02, 2020 6:37 am

Joshua_G wrote:Thanks, however NPF batteries don't have 12V, so what's the catch?

All similar battery plates just upconvert 7.4V to 12V. This is not too efficient because DC-DC step-up voltage converters waste huge amount of power. Also due tiny size wattage output usually very limited. Components may became hot. there is no any info about max wattage output in specs, but it may be not enough to power 6K camera.
All my custom made accessories for BMMCC/BMMSC now available here https://lavky.com/radioproektor/
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Mark Foster

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Re: BMPCC 6K - External battery bank

PostThu Jul 02, 2020 2:47 pm

yes this is stepup votage, but you can power your
pocket for a minimum of 2 to 2 1/2 hours with one NP-F970
when it is coming from baxxter (10500 mAh) or so, and not from sony
and one of the battery costs only 45 dollar
cMP 5.1 2x3,46/96GB/2x2TB 860pro/4x4TB HGST/SSD7101A 4x2TB 970evoplus/HP1344/BMD4k/Radeon VII
cMP 5.1 2x3,46/96GB/2x2TB 860pro/4TB HGST/wingsX1 2TB 970evoplus/titanridgeTB3/HP1344/Radeon VII
cMP 5.1 2x3,46/96GB/vega64
cMP 5.1 2x3,33/96GB/vega56
OS 10.14.6
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Joshua_G

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Re: BMPCC 6K - External battery bank

PostSat Jul 04, 2020 12:09 pm

Many thanks to all replying.

Dmitry Shijan wrote:For P6K 50Wh battery probably not too effective and you need at least 100Wh V-Mount brick to power camera for few hours. But i still can offer 18650 battery enclosure. it was designed specially for BMMCC, but same time works well with any other device…
Thanks, Dmitry. According to your various posts, an external battery solution would better be 100Wh for it to be effective on the BMPCC 6K. Would I use your module, I'll need 2 of them, at $110 each, plus shipping and plus batteries cost. It's very expensive for me at this time.
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Dmitry Shijan

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Re: BMPCC 6K - External battery bank

PostSat Jul 04, 2020 12:38 pm

...and plus optional Charger, and plus DC cable for Pocket6K from some other seller. I guess 50WH may give you about 2 hours on Pocket6K. Some people use it with Pocket4K, but i have no feedback from Pocket6K users yet.

My 18650 battery enclosure is very specific handmade product, designed for fit BMMCC cage size and provide about 6 hours working time. Only 50 copies where manufactured. So yes, it is not a cheapest option if you just want basic battery pack. But in 1-2 years perspective my battery pack became cost effective because you just replace 18650 cells for $20 instead of purchase new V-mount battery for $100-200.
All my custom made accessories for BMMCC/BMMSC now available here https://lavky.com/radioproektor/
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Joshua_G

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Re: BMPCC 6K - External battery bank

PostSat Jul 04, 2020 5:35 pm

Dear Dmitry, I didn't say, didn't mean and didn't imply that you charge too much. Your costs of designing and manufacturing those units are understood.
Only, it's too expensive for me at present.
Anyhow, most of my shoots will be stationary, with the camera on a tripod. Thus, for now, whenever and wherever there will be no mains power, I'll just use a proper cable to feed the camera from a large 12V power-bank that will lay on the floor.
DaVinci Resolve Studio/Windows 10 Pro x64/AMD 1920X/32GB RAM/RX Vega56 8G.
BMPCC 6K.
Retired electronics technician and sound engineer, long-time amateur photographer, beginner hobbyist filmmaker for personal uses.
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Uli Plank

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Re: BMPCC 6K - External battery bank

PostMon Jul 06, 2020 6:37 am

The Talentcell power bank has 12 Volt too and is pretty cheap.
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Re: BMPCC 6K - External battery bank

PostMon Jul 06, 2020 7:29 pm

Thanks, Uli.
They aren't portable in a way of ability to attach to the camera cage (SmallRig, in my case).
I have already similar power banks that I can lay on the floor.
DaVinci Resolve Studio/Windows 10 Pro x64/AMD 1920X/32GB RAM/RX Vega56 8G.
BMPCC 6K.
Retired electronics technician and sound engineer, long-time amateur photographer, beginner hobbyist filmmaker for personal uses.

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