Bright Way Replacement Battery for Rhino 3fm4 6V 4.5Ah Sealed Lead Acid
6V4AH SLA Battery (3FM4) - China Lead Acid Battery and Maintenance-Free Battery
Mighty Max Battery Replaces cp0660 gp645 lcr6v4p hk-3fm4.5 wp4-6 Rechargeable Sealed Lead Acid 645 Backup Power Batteries in the Device Replacement Batteries department at Lowes.com