Hey guys, i build my Quad to the point where all the motors are wired to the 4in1 ESC and the Main Power lead with xt 30 is connected. Now i want to power the quad for the first time in oder to check wheater it turns on. I dont have the Lipo yet but i heard that it is possible to power the quad with an powersupply. I got the Hota D6 Pro which has an Powersupply mode. Now i wonder what Voltage and Current to pick when testing the quad. Also i will be using the Vifly Smokestopper to make sure. Normally i would use an 4s 650mah Lipo. What current and voltage would you pick? Thanks in advance. 

When i am building and testing a 4s quad i typicaly set my lab power supply to 3s power (3x4.2=12.6V) and limit the amps to 1amp. That i feed also into a vifly for even extra protection (it itself has 2 power limits and first connection is with the lowest setting, but sometimes this gives a false alert when too much power is drawn by default for the build so typicaly its set at second power level).
When that all goes well i take away the fifly as it does not like continuous connection. That way i can start testing motors (set direction etc) which requires a bit of more power so i adjust the lab supply to 1.5 or 2 amps (or more) depending on needs.
But before all that test with a meter to see if there is no continuity between the vbat and ground.

Alternatively if you already have say a cheap B6 charger and a car battery, you can do much the same. Wire the car battery into a 12v fuse box or auto distribution box and wire the B6 into the fuse/distribution box (this would also allow you to wire in a USB socket as well to allow charging things from it), this would be better for a more permanent installation. Or wire the car battery directly to the B6 using an inline fuse. A cheap car battery could easily provide enough power via some chargers to allow you to power your quad or charge lipos and probably other things too. As long as your charger supports dc-dc conversion you should be fine.

One of the pro's of using a car battery is you could in some circumstances use a solar panel to keep the battery charged. If charging/powering at 4S, you might want to use two batteries in series to give you 24v, just for that extra push, which will make charging easier and more efficient (save the charger the need to (ab)use a buck boost circuit due to the input voltage being higher than the battery size).

The smoke stopper is going to trip on high current so not much need to set the current too high at the Hota. So just set for approximately 4s voltage if that's what your quad motors are designed for. Even at the lowest motor idle it will likely trip the 1-2amp limit of the vifly.