An uninterruptible power supply (UPS) is a system of electrical components to provide a buffer between utility power, or other power source, and a load that requires uninterrupted, precise power (e.g., a computer system, for the purpose of eliminating the effects of transient anomalies or temporary outages). This often includes a trickle-charge battery system which permits a continued supply of electrical power during brief interruption (blackouts, brownouts, surges, electrical noise, etc.) of normal power sources.