Mighty Max Battery 12V 22Ah UPS Replaces 20Ah Leoch LP12-20, LP 12-20 Rechargeable Sealed Lead Acid 12220 Backup Power Batteries in the Device Replacement Batteries department at Lowes.com
Amazon.com: UPG UB12220 UB12220-12V 22Ah Wheelchair Medical Mobility Battery : Health & Household