Handheldlegend.com
Yep, I did a pocket with a HHL backlight. However, it didn't work with rechargable NiMHs at all. I had to mod in a camera battery+recharger circuit, now it works fantastically.
As one of the "creators" of the bivert mod, I'll recommend it if you'd like to play indoors mostly. You do lose the ability to see it very well in the daylight.
Here's the ancient shit guide I wrote in high school: http://mikejmoffitt.com/articles/0004-bivert1.html
hahaha, this is awesome.high school mike said:
The price is a bit hefty, but it sounds promising for optimizing the power and hopefully increase the battery usage times.this product is especially useful with backlight and frontlight kits as a means to better regulate power usage within the console. it gives an output of 4.29V @ 50mA; the components have been chosen to compliment our frontlight and backlight products. hookup is relatively easy: connect the console's switched battery power supply to Vin and you get a predictable Vout for your frontlight and backlight needs.
If you are looking to optimize the power usage within your console, this kit will greatly assist towards that goal.