3DS Battery Life is Shorter in Comparison to DS
Nintendo upcoming handheld 3DS will required a frequent charging in comparison to DS as it will have shorter battery life.
Speaking to the investor during Q&A Nintendo President Satoru Iwata said
"As for the battery, it is inevitable that Nintendo 3DS will be a device which requires more frequent recharging than Nintendo DS, This is why we are going to include the cradle, which is a dedicated battery charger.
Perhaps we may need to dispatch to our consumers a message, something like, 'Please place your Nintendo 3DS on the cradle as soon as you return home with it'."
There isn't any details about how much battery life did 3DS have, the only confirmation made is that it will consist of Lithium battery