Was just playing with my n3DSXL and battery was 3 out of 4 bars. 10 minutes later it's zero bars with low battery warning. The only different thing I did today was use a new USB charging cable I got on amazon (5 star reviews mostly) that plugs into my 60W 6port Anker USB charger that I use to charge all my phone's and tablets. It has smart IQ tech which gives correct voltage. Anyone had this problem before? Did I kill my batter lol?