Dear Andy,
Got my Cayin C5 this afternoon and first thing I did was follow instructions and plugged it into a wall charger, the standard one that comes with Samsung phones. From what I've read, charging time is 7 hrs via computer and 4 hours via a wall charger. Plugged it in at 1:30pm and the charging lights finally stopped blinking at 10pm, meaning it took all of 8 hrs and 20 mins for a full charge out of the box.Is this 'normal' for a new purchase? I hope it doesn't mean the battery is defective. Thanks for any info.
Please check the power output on your charger, 5v/2a is recommended.
Good luck!