I have a Go 6000 and am rather dismayed at the fact that it holds its power for such a short amount of time after a full charge - even when switched off - a couple of days and a full charge has gone even without use. I also find that, despite the holder being wired into one of my cars USB points, it does not seem to charge the device and will often switch off due to lack of charge. I just wanted to know if this is normal, because as I have a 2 year guarantee from John Lewis and will take it back if this as a fault....... any advice would be welcome.