 | Keep yourself mobile with a long life Lithium based MP3 Player Battery. Lithium-Ion and Lithium Polymer batteries typically have longer lives than most other batteries, therefore they do not require replacement as often. AC Adapter, Manufacturer: Hewlett Packard, PN: 432309001 Number of Reviews: 0 | Ratings:  | Best deal: $39 $39 - $40 from 3 stores. |