New 600mAh Replacement Battery for Microsoft Zune 2nd Gen 80 GB / 120 GB Replaces the following battery part numbers: Replaces the following part numbers: 1126 1376 For best results for li-on batteries, please FULLY CHARGE the item overnight, and then on its first use, FULLY discharge the item. (Use the item until it fully depletes its battery after its first charge) DISLCAIMER: The names for Microsoft Zune, etc. are used for the sole purpose of describing the compatibilty of our items and identifying models they work with. These names are the copyrights of their respective owners. MCMConcepts does not intend to infer any connection / ownership / affiliation between MCMConcepts and any other company.