AJC® replacement compatible with Toro 417XT U1 Lawn Mower and Tractor Battery. Exact OEM replacement guaranteed to fit easily and precisely. Maintenance free AGM technology, no need to add acid or water ever. IMPORTANT: You MUST RE-USE: your existing cabling and hardware. These are replacement batteries only. NOTE: It is your responsibility to verify the batteries being ordered match the batteries in your unit prior to placing your order. We are not responsible for incorrect orders.