Can Power HD 1501MG handle more than 6 volts, since its "HD"?

I read somewhere that the "HD" meant the servo could handle 7.5 volts. But the specs I find for this servo list a max of 6.

If you look at the datasheet: you will
notice its made by HuiDa RC International. HD stands for HuiDa.

Part numbers are usually (but not always) of the form