Can z3 boot without the battery?

[ainidmor]

I have replaced the screen but the cable flex of the battery has broken. The phone don't respond NOTHING plugged to charger or the pc.... NOTHING.. (edit: red light only for 1 minute or 2)
I don't want to buy a battery if the phone is broken, or the new screen is not working....
Z3 must boot plugged to pc without battery connected?
Thanks