Some days ago I decided to do a test, playing Pokemon Diamond (and only that game) on lowest brightness setting with no cheats, soft-reset, RTS, and of course, no Wi-Fi (I guess there's still the saving factor, as DS seems to use more power while saving). It was loaded with Sakura 1.35 3rd. I fully charged my DS Lite, then I started playing while recording my play time with a watch. Today my DS finally turned off by itself while playing, and my play time was 9 hours, 1 min. I don't really have a retail copy of Pokemon Diamond so I can't compare, but my retail copy of TWEWY lasts WAY more time (I could play for a week, 2 hours/day, and it still had energy left). I know flashcarts use more energy than retail cards, but all the tests I've seen say ~4 hours on max brightness for both retail and ROM New Super Mario Bros., with a difference 20 min. Is it normal? Also, sorry for my bad english.