Sony NW-S710 NWZ-S600 NWZ-S600F NWZ-S610 NWZ-S615 Replacement Battery: BatteryClerk.com Media Player
Sony+Walkman+NWZ-S615F+Black+%282+GB%29+Digital+Media+Player for sale online | eBay
NWZ-S515 / S516 / S615F / S616F / S618F
USB Power Port Ready retractable USB charge USB cable wired specifically for the Sony Walkman NWZ-S618F and uses TipExchange
900mAh LIS1401 MP3 MP4 Player Battery For SONY NWZ-S615F NWZ-S616F NWZ-S615 NWZ-S616 NW-S710 NWZ-S600 NWZ-S618 - AliExpress
Sony Walkman NWZ-S615F Black MP3 Player NEEDS NEW BATTERY SELLING PARTS REPAIR | eBay
Amazon.com: AMGUR WMC-NW20MU USB Charger Cable Replacement Data Sync WM-Port USB Cable for Sony Walkman MP3 MP4 Player NWZ-S615f A916 A918 A919 NWZ-A10 NWZ-A15 NWZ-A17 NWZ-A25 (4 feet) : Electronics
Review: Sony S610 Walkman - Pocketables
Sony Walkman NWZ-E438 Battery Replacement - iFixit Repair Guide