Ezb4 How To Work With 7.2 - 8.4 Volt Servos?

Hi,

Anyone can help to answer my question that Ezb4 how to work with 7.2 - 8.4 volt servos?

I brought 2 big servos and it need 7.2-8.4 voltage power. But ezb4 just provide 5 voltages. So, I brought "meanwhile" 7.5 volt external power supply. So, what can I do to make and connect it work?

Thanks for your attention!

Ricky Ma