FlySky GT3 radio RX question

[simplechamp]

I'm sure many of you have seen the FlySky GT3 radio. It is the next model after the FlySky GT2 (which is the same model as the cheap HobbyCity $20 radio, and supposedly the RX's are interchangeable). The GT3 is a more advanced radio than the GT2 or HC radios, with LCD screen, multiple model memory, drop down wheel, and all the adjustment features you would expect.

http://kenbuys.com/flysky-fs-gt3-2-4...ransmitter-v3/

I decided to try this out because although my Nomadio works great, they are no longer being supported, and I want to have a cheap backup (there is a plastic part in the wheel mechanism of the Nomadio that is known to break). Also, I'm sick of buying expensive Spektrum RX's.

Now to my question, for anyone who has used the RX's (whether it be the FlySky badged ones or the HobbyCity ones): has anyone tested them running on 7.4V? The manual says 4.5-6V, but I was really hoping to be able to run 7.4V to power the HV servo in my truggy, and I'll soon upgrading to an HV servo in my buggy. Is it likely that an extra 1-1.5V could fry the electronics?

I think I'm going to go ahead and test one myself, since I bought a few extra and they are cheap anyway, but I wanted to see if anyone else has already run them on 7.4V. As always, thanks in advance for any help!