Ya got me curious about ign modules, so I went checking;

Saito, Evolution, 3W=correct

But for DA's their manuals still state;
"Use 4.8 or 6.0 volt batteries only. (We see no significant difference in engine performance
between the two.) The ignition will tolerate the peak charge voltage on these packs. Higher
voltage batteries will damage the ignition system and will void the warranty."

If one of their t/s folks said different, I'd be inclined to stick with the manual they print until those get updated.

DL;
"The DL50 ignition system is designed for input voltage ranging from 4.8 to 6.0 volts, no more and no less."

DLE; same as DL above