Lenmar Replacement Battery for iPod classic 4G Fits: Apple iPod 4G (Fourth Generation) Series, iPod 4G M9282, iPod 4G M9282CH/A, iPod 4G M9282KH/A, iPod 4th Generation M9282, iPod 4th Generation M9282CH/A, iPod U2 Edition 20GB, iPod U2 Special Edition 20GB 3.7V / 750mAh Lithium Ion 2 Year Warranty Caution: This Battery may require Skilled Installer or Special Tools to Replace. For Skilled End Users Only. Fits Apple iPOD Fourth Generation Units Replaces 616-0183 3.7V 750mAh Lithium-Ion 3 Year Warranty