des precisions sur l´autonomie et le retroeclairage de la ds lite :
The DS Lite will come with four adjustable levels of screen brightness, with the maximum setting being five times as luminous as the original DS´s. Battery life has also been improved. The original DS ran 6 to 10 hours on a full recharge, and the DS Lite runs for about the same number of hours on its maximum brightness. The new model can run 15 to 19 hours on its lowest brightness, 10 to 15 hours on its second level of brightness, 7 to 11 hours on its third level, and 5 to 8 hours on the maximum level. What´s more, the DS Lite´s battery recharges in three hours, which is an hour less than the original DS.
source : http://www.gamespot.com/news/6144058.html