Dear <my boss>, "Prototypation" is not a word. Thank you. -Photon.

Also, it's 8:15 PM, can we end this fucking meeting already?

@ThePhoton Nick is preparing a talk on prototyping**. You could extend the invitation to your boss. You could do that anonymously. You may or may not fore-warn him how vicious Nick can be.

** Seriously

@NickAlexeev Boss works 15 time zones away from here, though.

is it safe to use 4 1.2V batteries to power arduino ?

@O.Rares Try the dedicated Arduino stack and their chat. You'll have to specify which type of Arduino you want to power.

@O.Rares In series, ~4.8V is safe.

If you want to find out yourself, search: arduino vin max