Last year my original front hub started to shut off if I ran it on about 7 or higher, below that was fine. The first battery level bar would drop off pretty quick, but the last one would go a VERY long time. My extra (rear) battery has acted normally until recently. I can only run it on maybe level 4 now and it doesn't last real long. They were both doing reasonably until pretty recently. They both have always showed all 5 bars after charging.
I sent Rick an email last week with no response.