Newer Technology and Other World Computing have teamed up to release the
Ultra High Capacity replacement battery for first- and second-generation iPods. According to Other World Computing’s website, the Lithium-Polymer battery offers an extra 70-percent capacity over the iPods’ original battery. The original iPod batteries are rated at 1230mAh (milliamp hour, a measure of a battery’s total capacity) and this Ultra High Capacity version claims a rating of 2100mAh.
The battery costs $40 and includes a detailed instruction manual and two non-abrasive nylon tools for opening the iPod.