ScottHendrix wrote:I have a BMCC with a VMount Maxoak battery with Fotga power supply/vmount splitter. The Maxoak battery says 14.8V 177Wh, 12000mAh. The Fotga vmount supply the battery is on has a 12v DC output and a 14.8v Vemo output. I know the BMCC can accept a 14.8v but what I'm wondering is: If I connect the 12v output to the camera I know it is using 12v from the battery, but if I connect the 14.8v Vemo out from the Fotga supply to the BMCC is it going to be consuming 12v or 14.8v? I just want to know if using the Vemo 14.8v output is going to end up using more of the battery unnecessarily.
I need to use the 12V DC output to power my monitor so that is the reason I am asking about this. I searched Google and on the forum here but didn't find quite this same question.
Hi, Since I did not try this on a BMCC I am unsure if the voltage regulator in the BMCC can sustain over-current/over-voltage situations well. Most broadcast and film gear is okay playing in the voltage ranges of Lithium ION batteries from 11+ volts to 19+ volts while the optimal voltage is 12+ DC. In terms of battery consumption the camera will take what it needs at whatever voltage. As Lithium ION discharges it drops in voltage slowly, measuring this voltage is kind-of how the all Li powered equipment can produce progress bars of battery left. Depending on charge controller quality of your V-Mount battery and age of cells, you can have it output up-to 24v by accident if overcharged. As the Fotga outputs 12v it down-coverts current prob. between 9.5v - 13.5v - I think it would be safer to use 12v out for you to match the 120 AC/DC power supply for BMCC then gamble on internal circuits of the BMCC to protect from high voltage Li-Ion output.
Do ask Fotga if the current on 14.8(14.4) is Direct or regulated in the adapter. I know they have a more advanced model of this under the brand JTZ which has it's own internal charge controller and LiOn cells. That one may be safer.