Hi,
Somewhere in a German site I red that only 2% of the produced batch are affected by that problem, so chances are 98% for ours to be ok.
Mine also 'returned positive' with the serial number check. However I've recharged it a few times without a problem. I'm thinking of maybe sending it in an year or so, when the battery is however somewhat worn
If you return yours, could you share how much time it took your local supplier to fix & return it?