When using a Nintendo 3DS, battery life was always a guess everyone takes. For one thing, there will be no never-ending marathons of Super Mario 64 DS, and that’ll be in a range of 3 to 8 hours. Why so broad, you ask? Well, while playing a normal 3DS games, expect 3 to 5 hours on a full charge, 5 to 8 if playing an older DS title, and 3.5 hours to fully recharge the battery from a dead state.
Now before you try flaming about how those are very decent battery figures, let’s take a short history lesson: the original DS was 10 to 14 hours, the DS Lite was 15 to 19 hours, Nintendo DSi was 9 to 14 hours, and finally DSi XL was 13 to 17 hours on a single charge, as according to Nintendo themselves. So, keep the charger handy. Via: Nintendo JP, Kotaku