Power consumption measurements:BMMCC = 7.75W (8.06W during recording)
SmallHD 501 monitor (100% brightness) = 6.9W
Total average power consumption = 15W
Battery Module average output 14.8V x 3.4A = 50Wh (watt-hour)
50Wh : 15W = 3.33 hours total (or average 3 stable working hours until battery voltage drops under 12-13V safe limit)
Voltage meter indicator:4 LED lights - voltage is greater than 16V
3 LED lights - voltage is greater than 15.2V
2 LED lights - voltage is greater than 14.4V
1 LED light - voltage is greater than 13.6V
No lights - voltage is under 13.6V, but battery still have about 15-20% of usable emergency capacity.
Keep in mind that output voltage varies a lot depending of battery load.
Over discharge protection circuit switches off battery cells only when voltage drops under 10.2V, but to avoid battery cells degradation it is recommended NEVER discharge under 12V.
Battery cells FAQ:To avoid problems with Air Mail shipping, battery cells will NOT be included in the package. You need to purchase 4x 18650 sized UNPROTECTED lithium-ion battery cells somewhere in your local electronics store. Those battery cells are very common nowadays and will cost about $20-25 total.
Do NOT purchase batteries from unknown sources and unknown online sellers.
Do NOT purchase cheaper 18650 batteries labeled with something crazy like "4000mAh" or more. Those are fake and crap cells.
Do NOT mix different battery cells with different capacity, different brands or different age.
Some useful comparative 18650 battery tests:
https://endless-sphere.com/forums/viewtopic.php?t=91821http://lygte-info.dk/review/batteries20 ... arator.phpRecommended highest capacity (3400mA) 18650 batteries: SANYO/Panasonic NCR18650GABEST CHOICE! Maximum continuous load 10A. Normal charging current 1.675A. Maximum charging current 3.35A. Quality brand, low price, slightly extending positive pin friendly for battery holder. Made in Japan. Released in 2015. Panasonic NCR18650GA
Same as SANYO 20NCR18650GA but made in Panasonic China factory branch.
Panasonic NCR18650BMaximum continuous load 6.7A. Normal charging current 1.625A. Released in 2011. Samsung INR18650-35EMaximum continuous load 8A. Normal charging current 1.7A. Maximum charging current 2.0A. Released in 2015. SONY US18650VC7Maximum load 8A. Normal charging current 1.0A. Slightly overpriced compare to others, sometimes hard to find. Released in 2016. LG 18650 MJ1Maximum continuous load 10A. Normal charging current 1.7A. Maximum charging current 3.4A. Released in 2014.Recommended lower capacity (3000mA) 18650 batteries: Samsung INR18650-30QMaximum continuous load 15A. Normal charging current 1.5A. Maximum charging current 4.0A. Released in 2014. SONY US18650VTC6Maximum continuous load 15A. Normal charging current 3.0A. Released in 2015.Charger FAQ:For request i can add charger to the package, but currently i have very limited amount of chargers with EU plugs in stock.
Any existing 16.8V 1-2A CC/CV (Constant-Current/Constant-Voltage) charger will work.
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 speed vs quality charging current.
Just to be safe and simple - do NOT use charging current larger than 2A.Here are nice
series of recommended 16.8V chargers. They have recognizable design and quality internal parts. Ask seller for DC plug 5.5x2.1mm and AC plug type depending of your location.
DC power connectors compatibility FAQ:It is very odd and irrational, but there are two almost similar DC power connector standards walking between devices all around the world: 5.5mm (outer size) x 2.1mm (inner size) and 5.5mm (outer size) x 2.5mm (inner size).
5.5x2.5mm plug usually fits to 5.5x2.1mm socket but connection may be not too perfect if plug appears too old and outworn.
5.5x2.1mm plug do NOT fits to 5.5x2.5mm socket.
It is better to use plug connectors with inner center spring contact. They better hold center pin mismatches.
DC input power socket connectors compatibility list:BMMCC/BMMSC original expansion breakout cable - 5.5x2.5mm
BMCC - 5.5x2.5mm
BM Video Assist - 5.5x2.5mm
BMPCC - 2.5(2.35)x0.7mm
OLR Lite Breakout Box - 5.5x2.5mm
CGPro BMMCC/BMMSC Breakout Box - 5.5x2.1mm
SmallHD 500 series DC Faux LP-E6 Adapter - 5.5x2.1mm
SmallHD DP series - 5.5x2.1mm
All Atomos 7” recorders - 5.5x2.1mm
Angle Breakout Expansion Box by RADIOPROEKTOR - 5.5x2.1mm
Battery Enclosure Module by RADIOPROEKTOR - 5.5x2.1mm
Juicebox Magic Power - 5.5x2.1mm
ikan VL5, VL7, VH8, VK7(i), VX7(e,i), D5(w), D7(w), and VX9(e) monitors - 5.5x2.1mm
ikan iLED144, iLED-ONE, iLED6, iLED312(-v2), ID(B)508 LED Light Units - 5.5x2.1mm
Alternate Quick Release mounting systems for this battery:Compact size Arca Swiss Clamps ($15)
https://www.ebay.com/sch/Arca+Swiss+ClampFlat Manfrotto 200PL QR clamp by FotoPanda ($12)
https://www.ebay.com/itm/Quick-Release- ... 1370068854SmallRig Super lightweight 15mm RailBlock v3 942 ($10)
http://www.smallrig.com/super-lightweig ... 3-942.htmlSmallRig NATO Clamp 1885 ($40)
http://www.smallrig.com/smallrig-nato-clamp-1885.htmlSmallRig Handgrip Rosette Adapter ($39)
https://www.smallrig.com/smallrig-handg ... -1887.htmlSmallRig S-Lock Quick Release Mounting Device 1855 ($36)
https://www.smallrig.com/smallrig-s-loc ... -1855.htmlA MiniMart Mini Rapid Quick Release Plate ($13)
https://www.ebay.com/itm/Mini-Rapid-Qui ... 0699932144A MiniMart Quick Release Connector 1/4" Male Screw Adapter ($13)
https://www.ebay.com/itm/Quick-Release- ... 3090803295KONDOR BLUE Mini Quick Release Plate ($20)
https://www.amazon.com/KONDOR-BLUE-Moni ... 07JLHHD6W/POWRIG DSLR Monitor Quick Release Plate Adaptor ($20)
https://powrig.com/collections/camera-c ... te-adaptorPOWRIG Quick Release Plate Mount 1700-H Adaptor ($21)
https://powrig.com/collections/camera-c ... unt-1700-hSlidekamera ultra compact V-Mount system (€85)
https://www.slidekamera.com/v-mount-ada ... e-set.htmlWooden Camera V-Lock Base Station and Wedge Kit ($125)
https://woodencamera.com/products/v-loc ... unt-3-8-16Oben QRA-R2 Quick Release Assembly with RP-20 Plate ($30)
https://www.bhphotovideo.com/c/product/ ... embly.htmlCameo V-Lock Kit ($150)
https://www.abelcine.com/buy/camera-sup ... k-kit#tabsVelbon QRA-3 B Mini Quick Release Adapter ($25)
https://www.ebay.com/sch/Velbon+QRA-3+B ... se+AdapterCAMVATE Quick Release V-Lock Base Station And Wedge Kit ($57)
https://www.camvate.com/camvate-quick-r ... p2118.htmlCAMVATE V-Lock Base Station And Wedge Kit ($29)
https://www.camvate.com/camvate-v-lock- ... p1820.htmlTilta Pocket V-Mount Battery Plate ($23)
https://tilta.com/shop/tiltaing-pocket- ... ery-plate/