Hi, Tj1100cl.

Thank you for taking the time to type out such a detailed explanation.
I played around with both batteries and I do believe I have two duds.

The standard auto wouldn't take a charge. It seemed to that first time but I got nothing from the battery. Tried again and the LED kept blinking and it would appear to be charging and then the green light would go on...and I would try to use it and it was dead. Then it let me charge it for several hours...and nothing.
And the XL Stealth only lasted about 4 1/2 hours, yesterday, with VERY light vaping...before it died. Today it lasted a little longer, with SUPER LIGHT vaping...and then I had it sitting on my desk and it started hissing and crackling...like when you're getting a good hit on a fresh carto...only NO ONE was hitting it. LOL It just kept doing that and I took the carto off and the top was a bit melted and the battery was gone pecan -- deader than dead.
I tinkered with the posts and tried two different chargers...and I threw in the towel. Opened a ticket for one, yesterday...and added on about the other, today. I REALLY loved that Stealth, too. So neat looking and good power...when it worked.
Oh, one thing...
I also ordered a bottle of Wow juice and apparently the little dropper and bottle top were on it in a hinky way...and about 3/4 of the bottle leaked inside of the evelope. Most of it was caught by the bubble wrap in the envelope...but I'm wondering if the juice got into the (auto) batteries and that's what's wrong. It was licorice juice...and I could smell it about twenty feet prior to hitting my mailbox. I imagine my mail-person wondered just what was in that packet!