Rack-mounted LiFePO4 batteries offer data centers superior longevity, higher energy density, and lower operational costs compared to lead-acid batteries. With 3-5x longer lifespans, up to 95% efficiency, and compact, safe designs, they are ideal for modern UPS systems. Shenzhen-based Redway Battery. In this guide, we'll discuss how to choose a server rack battery, differences between lithium-ion vs lead-acid options and cover maintenance, cost and technical specifications to make the right choice for you. Before you pick out a battery, determine how much power you need. lead-acid), runtime requirements, scalability, and compatibility with existing infrastructure.