It's an obsession but it's pleasin'
I received my FW8 on Wednesday and I am experiencing the same thing with the green light but only with one of my batteries - the light stays green even after more than an afternoon and overnight charging, but I also get the 4 buzzes and got 6 bowls out of it. The other battery does not display that, the green light turns off after full charge. It does not look like this apparent anomaly affects the device or its performance, no excessive heat, no smell, i will monitor and may let Marc know.
Re-reading folks experiences with first charges is bringing back some memories. I know I've had devices where the battery's first charge took forever and I finally just unplugged it. I then plugged it right back in to see if it would continue charging and it immediately signaled a full charge. After that, I never had that issue again. Maybe try that with your packs that have been charging for a super long time.
By the way, without trying to be controversial I love the look of the FW8 and to me it is a piece of modern art. I will review more after further discovery over the weekend. But thanks everyone who has shared their experience and first impressions, with a special mention of @moondog, the pre-read allowed me to get right into it.
You are most welcome. Enjoy!!