Tenergy 12V 4.5Ah Sealed Lead Acid (SLA) Battery. Tenergys Sealed Lead Acid Rechargeable Battery - valve regulated, which fixes the acid electrolyte in absorptive fiberglass. Product is designed to be used in close proximity with people and sensitive equipment. Maintenance free. Designed to work with UPS systems, EPS (Electronic Power Systems), emergency light & backup power, alarm & security, and many more applications.