Amazon.com: 12V 35AH SLA Battery Replacement for Karma KS747 Wheelchair - 2 Pack : Health & Household
12V 28AH AGM Deep Cycle Rechargeable Battery – Uneek LEDs
Mighty Max Battery 12V 18AH SLA Battery for DR Field and Brush Mower Rechargeable Sealed Lead Acid 12180 Backup Power Batteries in the Device Replacement Batteries department at Lowes.com