Salicru’s SLC TWIN RT2 LION series are uninterruptible power supply (UPS) systems that offer the most reliable on-line double conversion technology on the market, with output power factor PF=0.9, a format that adapts to suit any tower/rack environment, lithium-ion batteries and a wide range of options for communication. The use of lithium-ion batteries as a backup power source has numerous advantages over traditional valve-regulated lead acid (VRLA) batteries: their lifespan is more than double, they can accommodate up to 10 times more discharge cycles, their rate of self-discharge is four times lower, they can maintain their level of performance at high temperatures (40ºC), they offer reduced weight and volume, and they can be recharged up to four times faster (among other advantages). With regard to TCO, lithium-ion batteries have a longer useful life than the estimated working life of the UPS (10 years), meaning that unlike VRLA batteries, they do not need to be replaced. Consequently, a slightly higher initial investment is converted into a significant saving by the time the system reaches the end of its life.