Amazon.com: ExpertPower 6 Volt 4.5 Amp Rechargeable Battery (EXP645) : Tools & Home Improvement
MIGHTY MAX BATTERY 6 -Volt 4.5 Ah Rechargeable F1 Terminal Sealed Lead Acid (SLA) Battery ML4-6 - The Home Depot
Power Sonic Lead-Acid, Quick-Disconnect Tab Terminal, 6 Volt, 4.5 Amp, Lead Rechargeable Battery 3/16" Tab Width x 0.8mm Tab Thickness, 1.86" Wide x 3.94" High x 2.76" Deep PS-640F1 - 96302393 -