Description

APC Back-UPS 500

Uninterruptible Power Supply

Good working condition

The APC Back-UPS CS 500 (BK500EI) is a compact UPS (Uninterruptible Power Supply) designed for PCs, routers, small servers, network equipment, and office electronics.

Main features

• Power capacity: 500 VA / 300 W
• UPS topology: Standby / Off-line UPS
• Input / Output voltage: 230 V AC
• Waveform: Stepped approximation to sine wave
• Transfer time: ~6 ms typical, 10 ms maximum
• Battery type: Sealed lead-acid (VRLA) rechargeable battery
• User-replaceable battery: Yes
• Outlets: Typically 4 IEC C13 battery-backed outlets (some variants have 6 outlets)
• USB communication port: Yes, for automatic PC shutdown and monitoring
• Surge protection: Protects against spikes, surges, and blackouts
• Runtime:
  • ~14 min at 50% load
  • ~3–4 min at full 300W load

Physical specifications

• Dimensions: approx. 91 × 165 × 284 mm
• Weight: around 6.0–6.3 kg
• Form factor: Tower/Desktop

Typical use cases

• Desktop PCs
• Routers and switches
• NAS systems
• Small medical or laboratory electronics
• POS systems
• Home office backup power