I am using a 3.7v battery to power a saber with NBv2 and Power Xtender for FoC. Everything is working fine but when I pull the kill key the LED in the momentary switch is very faint, then goes off all together. I've checked connections and even re-soldered the connections at the switch but to no avail. I'd assume the LED had gone but the light does come on intermittently, but it always ends up fading away. I'm using a Dynaohm resistor. Could it be an issue with the resistor? Also, when I pull the kill key, the main LED for the blade very briefly flashes. It is literally a split second flash and not very bright. Is this normal or should I be concerned about this too? As I said, the light, sound and FoC all work fine when the saber is active; it's just these last few issues that I'm having. Any help would be appreciated.