Nintendo's development of the gameboy

I've recently acquired a gameboy advance SP, see i made an intro for my friend "mrretrocity" (have a look at his work on youtube) and he wanted to repay me for creating the introduction for him and since he goes to a lot of car boot sales, he was able to pick up a gameboy advance SP for 4 pound with the charger and so me and him came up with a compromise to work on both sides. Since i had a lot of gameboy advance games without a DS/GBA to play them on. i thought the logical choice would just get the gameboy advance and now, it was definitely worth doing the introduction for him. I've recaptured all of my childhood memories with Crash XS and Banjo kazooie's grunty's revenge and mario kart super circuit. 

here's why i'm talking about the gameboy advance SP. it astounds me that up to the gameboy advance SP, nintendo didn't realise that people wanted to play their gameboy at night especially little kid when they really want to play the gameboy when they got sent to bed. even all the years that nintendo were producing gameboy's you'd think that they would have caught on that that. it might have not been ideal for the battery life since it had to power the back light. i can see why nintendo didn't include but things like peripheral's being added onto the gameboy that was also there for wasting the battery.

I think nintendo should have decided to have a lithium polymer battery soon with the previous gameboy advance. and as always thanks for listening.