Hacking Replacement DS Lite Battery

[em0b0y24]

my ds lite battery isn't holding that much of a charge as it used to. i run the battery down until its red and then charge it overnight. i get about 4 hours of play when i used to get about 6-8 on a single charge. i've been looking for a replacement battery online and don't know which one would be a good replacement. all the reviews ive read on deal extreme say the batteries are nowhere near as good as the original one. if anyone could direct me to a site where i can get an official nintendo battery or one equal to its quality i'd appreciate it