Synergy Digital Player Battery, Compatible with Philips GoGear SA3115 Player, (Li-Pol, 3.7, 450mAh) Ultra High Capacity, Replacement for Philips 0 Battery - Walmart.com
Synergy Digital Player Battery, Compatible with Philips GoGear HDD082/17 2GB Player, (Li-Pol, 3.7V, 550mAh) Ultra High Capacity, Replacement for Philips 742345 Battery - Walmart.com
Philips GoGEAR SA10PS16K/02 OPUS 16 GB - Full Disassembly (& Comments) - YouTube