what do the preloaded sounds mean Nano Biscotti V3?

[Lord Dragon Master 9000]

I've just finished my first saber build, nothing fancy, just a start. It's got the Nano Biscotti V3 inside and I'd just like to know what the meaning of the sounds in the preloaded sound font are.

Obviously there are the activation and deactivation sounds, but there is also a sound when I drop the battery in, a humming sound after deactivation, and then what sounds like more boot up sounds after I press the button to stop the humming sound (which is after deactivation).

I suppose my question is, why are there boot up noises and humming/crackling noises when all I want to do is have the saber turn on and off? It basically means I have to press the button several times when I want to deactivate the saber, which wouldn't be a problem were it not for the boot sounds constantly playing until I press the button three times.

Also I left the battery in while I was away for a couple of months and the battery was completely depleted when I came back even though it was (what I thought was) completely off. Are the batteries not supposed to be left in?

By the way I have a latching switch if that makes any difference, and could the boot sounds occuring after deactivation be the result of too much movement within the chassis? Perhaps the battery keeps connecting then disconnecting causing the Biscotti to think the battery is being taken out then put back in?

Thanks in advance, and apologies for being such a saber casual.

Edit: I have not changed the sound fonts at all and all the parts are exactly as they came to me.