PortaCell 3.7V, 580mAh replacement battery kit for Apple iPod Classic 80G / 120G models PortaCell New Internal Replacement Battery Kit for Apple iPod Classic 80G / 120G with 2 Opening Tools & Instructions to Change your iPod Battery. Li-Polymer battery (3.7V, 580mAh) with 10% higher capacity than the original. Designed for iPod Classic 80G - 120G (80GB Silver: MB029 , 80GB Black: MB147), 616-0392 (model EC008-3) FREE UPGRADE to USPS Priority Mail service with Signature Confirmation on all orders over $75-, delivers within 2 days to most cities) One year replacement Warranty