Uninterruptible Power Supply Unit with Internal Chargers assures high density, performance for voice and data networks, medical labs and light industrial applications. The Uninterruptible Power Supply Unit is provided with high power internal chargers that permit virtually unlimited additional matching battery packs to comply with aggressive runtime requirements of business critical systems. The Uninterruptible Power Supply Unit is suitable for tight voltage and frequency regulation, internal bypass and input power factor correction. Uninterruptible Power Supply Unit with Internal Chargers can be availed in varied range of specifications to cater to individual requirement.