Amazon.com: FIAMM FG21803 12V 18Ah Sealed Lead Acid - AGM - VRLA Replacement Battery : Health & Household
Fiamm Replacement Battery For Sai Apc Smart-ups 2200, 12v, 18ah/216wh, Lead-acid, Rechargeable, 181mm X 76mm X 167mm, Original New - Battery Accessories & Charger Accessories - AliExpress