[Battery charging over USB]

As long as it's single battery then it's ok to charge with usb. Dual battery or more it's better to charge with external charger.

[LED Configurable?]

just click on near the end of the box and select color black.. and then it will automatically change to gradient

[DNA75 EScibe Settings]

Hi! I'm a new user here. For almost 3 weeks using vt75 not even a single moment i had any weak battery message. Using some old LG HE4 gives no issue either since i vape at 20-25w set the preheat at medium punch not more than 2 secs. It depends on the battery amp and the calculation to make sure when using preheat the wattage doesn't sag the battery amp  too much. And also got my 26650 AWT 4500mah battery inside my dna 75 right now.. work like a charm, no issue either.