I have a standard sized New 3DS and my playtime battery is closer to 3-4 hours, depending on the game. It also lasts about 48 hours max in sleep mode, assuming I don't use it during that time. What that means is that if I fully charge it and leave it on in sleep all day I get about 90 minutes playtime battery in practice when I play that night.
Yeah, it's definitely closer to 3 for me.
They always exaggerate this crap.
