I had a rattling battery in my Pluid Reo this morning. Odd, because I have been using this same coil for the last week and a half. I put a fresh battery in this morning and it was rattling around. Checked spring and it was at half height. Still vaping, but not great. Checked the coil on the Chalice and it looked good. Nothing touching. Oh well. Put a fresh DZ jig / Super-X .79 ohm Z coil on with a nice dense cotton wick, short tails and now I am vaping like the sir that I am. Random post, I know. Just checking in.
Glad you had a work around, but do keep an eye on it...and when you have a moment, replace that spring. It has been found that a collapsed spring won't provide the same 
