CyberPower CST1500S Sinewave Battery Back-Up 1500VA

The CyberPower CST1500S is a 1500VA / 900W line interactive Uninterruptible Power Supply (UPS) in a mini-tower form factor, designed to protect desktop computers, workstations, networking devices, and home entertainment systems. It delivers pure sine wave output, making it fully compatible with active PFC power supplies found in modern computers, and produces battery backup power that is identical to or cleaner than utility grid power, with low total harmonic distortion and minimal electrical noise.

Automatic Voltage Regulation (AVR) continuously corrects minor voltage fluctuations — such as brownouts and spikes — without switching to battery power, extending battery life in areas with unstable power. The unit features 10 NEMA 5-15R outlets: 5 with surge and battery backup protection, and 5 with surge-only protection, including 2 widely spaced outlets for transformer-sized plugs. A multifunction LCD panel displays real-time UPS battery and power status. Two USB Type-A charge ports (5V, 2.1A shared) keep mobile devices charged even during a power outage. Data line protection is provided via a 1-in/1-out RJ-45 Gigabit network port and a coaxial port, with 1030 joules of surge suppression and full EMI/RFI filtration.

The CST1500S connects via USB (HID-compliant) or serial port and is compatible with CyberPower's free PowerPanel Personal software for Windows, macOS, and Linux. The internal sealed lead-acid battery (2 × 12V / 9Ah) provides approximately 9 minutes of runtime at half load and is user-replaceable (replacement cartridge: RB1280X2B). The unit recharges in approximately 8 hours. It is ENERGY STAR certified, features GreenPower UPS Bypass Technology to reduce energy consumption during stable utility power, and operates in an ultra-quiet design. The CST1500S is backed by a 3-year warranty (including batteries) and a $500,000 Connected Equipment Guarantee. Includes UPS system, user manual, and USB A+B cable. Dimensions: 3.9 × 10.4 × 14.2 inches; weight: 24.7 lbs.