I recently bought a used saber off a friend (monarch, blue blade, obsidian sound card) and it is set up for 4xAAA alkaline batteries. if i were inclined to do so, how difficult would it be to convert the hilt to use the Lithium batteries on this site?
One other very serious thing to take into account.
Chances are, that if you have sound, and a 4xAAA setup, you're actually running the Obsidian LITE board, which is designed for the 6 volts from the 4xAAA and not for the 7.4 volts from the L-Ion setup
You could very easily overload the soundboard if you up the voltage like that