Powery GEL battery for forklift SAI 6V 4,5Ah (replaces also 4Ah 5Ah), 6V, 4, 5Ah/27Wh, Lead-Acid battery, rechargeable, 70mm x 47mm x 107mm, 100% Compatible. New - AliExpress
UPG 6-Volt 4.5 Ah Sealed Lead Acid (SLA) AGM Rechargeable Battery UB645 - The Home Depot
Rechargeable Battery 6 Volt Sealed Lead Acid 6V 4AH 4.5AH 6V4.0 | eBay
Amazon.com: ExpertPower 6 Volt 4.5 Amp Rechargeable Battery (EXP645) : Tools & Home Improvement