Hello. I have DSi with USB charger (only). I charged it for 2 hours and 20/30 minutes. The light didn't go out. Will DSi automatically stop charging with unofficial charger? Also the official charger output voltage is 4.6V. The USB one is 5.0V. After charging I checked the battery and it was 4.15V. Quote from DSi mamual: Battery recharge time is approximately 2 - 1/2 hours.