UPG 4V 4.5Ah Universal Power Group 85923 Sealed Lead Acid Battery 806593405594 | eBay
Tenergy 12V 7AH Sealed Lead Acid (SLA) Battery - Tenergy
Nite Lite NL640 Battery Replacement - UB645 Universal Sealed Lead Acid Battery (6V, 4.5Ah, 4500mAh, F1 Terminal, AGM, SLA) - Includes TWO F1 to F2 Terminal Adapters - Walmart.com
Set of 4 - 6V 4.5Ah SLA Batteries + Shipping Included