Zicky

Howdy, I am a happy owner of MZNH1 but recently it developed somewhat strange battery charging issue. The unit is roughly 1,8 months old. Normally, when i'd completely drain the battery and then put it back onto charging cradle unit always read 60 minutes. But now when battery is completely empty unit only shows 30 min charging time?! I have tried several times to charge it full and let it completely drain but it still only shows 30 min when back on the cradle. Strangest thing is that it would still continously run for some 16 hours (132 kbps). I have also tried resetting the unit by removing the battery overnight. Has anyone else here encountered similar issue? Is my battery about to die or is there some other problem with the unit? Kind Regards