The battery in a UPS system is its most valuable – and most vulnerable – component. The battery is the part that picks up the slack if you lose power from your electric utility. It keeps your equipment online until you can safely ramp down, or regular service is restored.
It’s critical to know when the system was last serviced and especially when UPS battery replacement was performed. Batteries can lose effectiveness over time even under light use.
What Kind of Batteries Does a UPS System Use?
A UPS can use several types of batteries.
Three kinds dominate the market:
Valve-Regulated Lead-Acid Battery (VRLA)
The most common UPS batteries are lead-acid batteries, used thanks to high efficiency, low costs, and resistance to environmental factors. This type of battery safely vents gas from the system if the internal pressure of any battery unit becomes too high.
Water can’t be used as a coolant in a VRLA setup. With that in mind, its placement and environment are keys to extending its service life. A VRLA battery should be stored at room temperature in a dry location, preferably with automated climate control.