http://www.macnn.com/articles/05/03/03/4g.ipod.battery/
Newer, OWC debut high-capacity battery for 4G iPod
updated 10:55 am EST, Thu March 3, 2005
4G iPod battery
Newer Technology and OWC today introduced a new high-capacity for all fourth-generation ("4G") Click Wheel iPod models. The NuPower 4G battery model offers the "maximum capacity possible" with 20 percent more capacity than the factory-installed battery shipped with 4G iPod models. The company also sells 2100mAh and 1800mAh iPod batteries, which offer up to 70 percent more capacity for first- and second-generation models, and the 850mAh iPod battery, which offers 30 percent more capacity for third-generation models. NewerTech 4G 750mAh iPod battery, available for $26, includes non-scratch installation tools and instructions for installation.
