Power-Sonic 6V/4.5AH Medical Battery w/ WL Terminal
Amazon.com: TOPUSSE Rechargeable 6 Volt 4.5AH LiFePO4 Lantern Battery with Charger 1500+ Cycles, 6V Batteries Battery with BMS (Spring Terminals) 2 Pack : Health & Household
UPG 6-Volt 4.5 Ah Sealed Lead Acid (SLA) AGM Rechargeable Battery UB645 - The Home Depot
Lead Acid Battery 6V4.5ah-Sealed-AGM-Battery-for-Solar/UPS/System/Battery Charger/Power-Supply/Power Bank - China Battery, Lead Acid Battery | Made-in-China.com
6V 4.5AH Battery Charger Circuit using LM317T Voltage Regulator