OTOH I remember my DS Lite being surprisingly terrible about preserving the battery with the lid closed on "sleep." It wasn't much of a sleep state as it were,

OTOH I remember my DS Lite being surprisingly terrible about preserving the battery with the lid closed on "sleep." It wasn't much of a sleep state as it were, you got maybe a day in that state which wasn't all that much different than its active battery life in general. At least the games would boot very fast so there wasn't all that much friction unless it was the sort of game that wouldn't let you save. A chip like an r4 was a huge boon in that regard as you could "save" state at any point and have that write to the microsd and then fully power down and reboot right back in where you left it.