Welcome Amberlee. Yes that green flicker is normal, and as Rocco stated it will glow solid green when charged.
Glad you're enjoying the Zeus Scott sir. Suggest putting the condoms back on your smileo for storing it filled long term, yes the juice can dry out and how hot and/or humid it is will determine how long that takes. Usually you're good for overnight, but more than 24 hours is not suggested.
Welcome Amberlee (guessing Ms.?) to the forum. Suggest using the usb port to charge the Zeus as well....
"I know that I am hard to love, I know that I ask for far too much, but we get what we ask for sometimes, and sometimes we miss the mark. We miss the mark..."- ilyAIMY "the MARC"