Amazon.com: 12V 7.2Ah F2 Sealed Lead Acid (SLA) Replacement Battery for Tripp Lite BCINTERNET 450 : Electronics
Mighty Max Battery 12V 18AH for Stanley Fatmax 450 Amp Jump Starter Rechargeable Sealed Lead Acid 12180 Backup Power Batteries in the Device Replacement Batteries department at Lowes.com