Hi Boz
I just got the iwalk charger for Christmas but can't get it to charge a 2nd time without partly recharging the iwalk to reactivate it. It lists this scenario in the Q&A on the info sheet (manual?). I'm using it with my HD2 that takes only about 1/3 of the capacity of the iwalk.
When the HD2 is charged it drops out of "charging mode" & after a while the iwalk appears to switch off. I've been unable to get any life from it using the button on it (including the torch feature).
I can't see the point of the iwalk if it has to be part recharged sometimes to reactivate it... if I'm going to carry a charger then I'd carry the HD2's charger!!

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Have you come across this problem & solved it?
Thanks
Eddie