Thread: BMMCC 14.8V Battery Module by RADIOPROEKTOR

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  1. #71  
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    How simple is it to replace the interior batteries once they are discharged?

    Can you charge them via one of the DC ports?

    How much will this cost?

    I like how if you don't want to use the lpe6 mount you can still attach it elsewhere via the cheeseplate. Is this correct?

    Thanks
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  2. #72  
    Senior Member shijan's Avatar
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    How simple is it to replace the interior batteries once they are discharged?
    Just unscrew four little screws, take off rear cap and insert battery cells. It is not designed to take battery cells on and off many times per day. But if you really want to go this way you can use it without attached rear cap.

    Can you charge them via one of the DC ports?
    Yes you charge them via any of the DC ports with special charger.
    Charger FAQ:
    Any existing 16.8V 1-2A CC/CV (Constant-Current/Constant-Voltage) charger will work and will cost you only $3:
    https://www.ebay.com/sch/16.8V+charger
    https://www.aliexpress.com/wholesale...=16.8V+charger
    Some battery cells require 1A, some 1.7A normal charge current. For rapid charging some modern batteries may support maximum current up to 4A, but they may became very hot during that extreme charging. Higher charging current = faster charge = quicker battery degradation, but i think it is not a problem when you can just put new battery cells inside this box after 500 full charge cycles (1-3 years of usage). 2A probably the safest and most optimal charging current that provides best speed vs quality ratio. Just to be safe and simple - do NOT use charging current larger than 2A.
    Here are also recommended reliable and tested series of 16.8V chargers. They use quality internal parts and have recognizable design that can't be confused with other DC adapters in your bag. Just ask seller for DC plug 5.5x2.1mm and AC plug type depending of your worldwide location.

    How much will this cost?
    $125
    Package includes:
    - Battery Enclosure Module with removable rear shell (18650 battery cells are NOT included in the package)
    - Removable passive Canon LP-E6 type connection base
    - 4x M3 flat head screws
    - 3x 1/4"-20 3/8" length button head screws
    - 5/32" allen wrench hex key
    - Tiny Phillips cross-head screwdriver
    - 13cm DC power cable with 5.5x2.1mm angle plug connector
    - 13cm DC power cable with 5.5x2.5mm angle plug connector (5.5x2.1mm compatible)
    - 29cm DC power cable with 5.5x2.1mm angle plug connector
    - 29cm DC power cable with 5.5x2.5mm angle plug connector (5.5x2.1mm compatible)


    I like how if you don't want to use the lpe6 mount you can still attach it elsewhere via the cheeseplate. Is this correct?
    Yes, correct. I even collect a list of Alternate Quick Release mounting systems for this battery:
    Compact size Arca Swiss Clamps ($15)
    Flat Manfrotto 200PL QR clamp by FotoPanda ($12)
    SmallRig Super lightweight 15mm RailBlock v3 942 ($10)
    SmallRig NATO Clamp 1885 ($40)
    SmallRig Handgrip Rosette Adapter ($39)
    SmallRig S-Lock Quick Release Mounting Device 1855 ($36)
    A MiniMart Mini Rapid Quick Release Plate ($13)
    A MiniMart Quick Release Connector 1/4" Male Screw Adapter ($13)
    KONDOR BLUE Mini Quick Release Plate ($20)
    POWRIG DSLR Monitor Quick Release Plate Adaptor ($20)
    POWRIG Quick Release Plate Mount 1700-H Adaptor ($21)
    Slidekamera ultra compact V-Mount system (€85)
    Wooden Camera V-Lock Base Station and Wedge Kit ($125)
    Oben QRA-R2 Quick Release Assembly with RP-20 Plate ($30)
    Cameo V-Lock Kit ($150)
    Velbon QRA-3 B Mini Quick Release Adapter ($25)
    CAMVATE Quick Release V-Lock Base Station And Wedge Kit ($57)
    CAMVATE V-Lock Base Station And Wedge Kit ($29)

    P.S. All this info was already posted here in details, just scroll back few pages back n this thread.
    Last edited by shijan; 06-05-2019 at 09:05 AM.
    All my custom made accessories for BMMCC/BMMSC now available here https://lavky.com/radioproektor/
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  3. #73  
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    I can recommend the Kondor Blue knock off of the 16x9 quick release. I haven't tried the other clones because of the poor reviews, but I bought KB's and was impressed enough to buy another.

    https://www.amazon.com/KONDOR-BLUE-M...ustomerReviews
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  4. #74  
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    Hi shijan, can we already place the order?
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  5. #75  
    Senior Member shijan's Avatar
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    Not yet. I am still waiting for the package with rear caps and enclosures as well as parts for expansion boxes used for other known project. Now it seems some small delays in delivery due easter holidays.
    Probably i could create preorder page in the marketplace but not sure if it make things move faster.
    Parts are waiting to be assembled. As you can see no any problems with soldering, but overall process is still rather slow for mass production. Need to tin plate those parts, bend connectors, cut shrink tube with proper length, put two layer of thermal shrink tube, solder it, clean up flux, cover with protective paint. I try to do all processes in batch to speedup things. Also last months i use modular storage boxes which makes things way more organized.





    Last edited by shijan; 05-01-2019 at 10:44 PM.
    All my custom made accessories for BMMCC/BMMSC now available here https://lavky.com/radioproektor/
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  6. #76  
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    I want one!!
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  7. #77  
    Senior Member shijan's Avatar
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    So i finally assembled and tested some amount of enclosures!

    Full info, tech specs and FAQs now located in For Sale / Want to Buy forum thread: http://bmcuser.com/showthread.php?23247

    Order here: https://lavky.com/radioproektor/

    Worldwide Shipping & Packaging cost (should be added to cart separately):
    1x Battery Enclosure + LP-E6 plate = $14
    1x Battery Enclosure + LP-E6 plate + 1x Charger + other optional small BMMCC accessories kits = $19
    2x Battery Enclosures = $19
    2x to 4x Battery Enclosures + 1x Charger + other optional small BMMCC accessories kits = $24
    3x to 5x Battery Enclosures = $24

    Battery Enclosure kit includes:
    - Battery Enclosure Module with removable rear shell cap
    - 4x M3 flat head screws
    - Phillips cross-head screwdriver
    - 13cm DC power cable with 5.5x2.1mm angle plug connector
    - 13cm DC power cable with 5.5x2.5mm angle plug connector (5.5x2.1mm compatible)
    - 29cm DC power cable with 5.5x2.1mm angle plug connector
    - 29cm DC power cable with 5.5x2.5mm angle plug connector (5.5x2.1mm compatible)

    LP-E6 type Connection Plate kit includes:
    - Canon LP-E6 type dummy connection plate
    - 3x 1/4"-20 3/8" length button head screws
    - 5/32" allen wrench hex key

    Package cost total:
    BMMCC 14.8V Battery Enclosure kit = $110
    Canon LP-E6 type Connection Plate kit (optional) = $15
    Charger (if available) = $18








    Last edited by shijan; 06-08-2019 at 01:39 PM.
    All my custom made accessories for BMMCC/BMMSC now available here https://lavky.com/radioproektor/
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  8. #78  
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    Here are some real life discharge/charge tests and measurements done recently. For measurements and discharge i use special electronic load device.
    Discharge current was set to 2A (average 30W load).
    Battery cells used - SANYO NCR18650GA 3500mA.

    Fully charged battery voltage is 16.8V, but when you connect 30W load, voltage drops somewhere to 15.9V
    Discharge time from fully charged to 12V = 1 hour 30 minutes.
    Discharge time from fully charged to 11V = 1 hour 35 minutes.
    Discharge time from fully charged to 10V = 1 hour 39 minutes.
    Protection circuit automatically turns battery off when voltage drops under 10V.
    Charge time with recommended 2A charger = 2 hours
    Real life battery capacity for 30W device load = 45 watt-hour.
    As you may know real life battery capacity highly depends of device wattage load. Less wattage consumption may allow to reach 50-55 watt-hour capacity.

    Power consumption measurements:
    BMMCC = 7.75W (8.06W during recording)
    Pocket Cinema Camera 4K = 22W max. (high frame rates, screen at 100% and recording to a media)
    SmallHD 501 monitor (100% brightness) = 6.9W
    Video Assist 5" = 9W

    Discharge time calculations:
    BMMCC = 6.2 hours
    Pocket Cinema Camera 4K = 2.2 to 4 hours (depends of camera settings).
    SmallHD 501 monitor = 7.2 hours
    Video Assist 5" = 5.5 hours


    All my custom made accessories for BMMCC/BMMSC now available here https://lavky.com/radioproektor/
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  9. #79  
    Senior Member shijan's Avatar
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    And here are some more fresh product images (all shoot on BMMCC)










    Last edited by shijan; 05-26-2019 at 09:20 PM.
    All my custom made accessories for BMMCC/BMMSC now available here https://lavky.com/radioproektor/
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  10. #80  
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    Well that's about as compact as you can get with a cinema camera! What hand grip is that?
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