Le Todar 2204 - 2300KV, but again rather than buying a stack and finding out that that quality was useless, i ordered a single. They are different models available depending on the amperage needed. Here are the different versions available according to the provided manual.
When the package arrived i was pretty amazed at the size of the ESC, This is tiny compared to a standard 20-30A ESC, this unit can easily be nicely tucked away on a QAV250 rig.
2mm or a 2,5mm plug will be ok for this ESC. I only had 3mm lying around so i used these and they are maybe larger than i wanted. Solder the three black wires with banana plugs and heatshrink the plugs after soldering.
I soldered two wires for the main power supply from my LIPO battery, you will need to of coarse mount the end with your favourite connector, Deans, XT60 or whatever you prefer, might sound silly but i have ade this simple mistake a few times, check your polarity and make sure it is not reversed + with + and - with -, sometimes one is so focused on other things, that these simple tasks tend to go wrong.
UBEC mounted on the distribution board that can provide the needed 5v power
Connect the motor wires to the ESC