Gomadic High Capacity Rechargeable External Battery Pack suitable for the Sandisk Sansa Clip Plus - Portable Charger with TipExchange Technology - Walmart.com
Synergy Digital Player Battery, Compatible with Sandisk Sansa Fuze 4GB Player, (Li-Pol, 3.7, 550mAh) Ultra High Capacity, Replacement for Sandisk 8JJH8F15 Battery - Walmart.com
Sandisk Sansa Fuze 4GB Sansa Fuze 8GB Replacement Battery: BatteryClerk.com Media Player