Description
Tripp Lite Smart550USB SM4457 UPS Battery Backup 550VA 300W 120V No Battery
The Tripp Lite Smart550USB (model SM4457) is a desktop uninterruptible power supply rated at 550 VA / 300 W. It provides battery-backed AC power to connected equipment during outages and voltage fluctuations, protecting computers and peripherals from data loss and hardware damage. This unit is sold without a battery — a compatible replacement battery with the correct voltage and connector type is required to restore backup functionality.
Specifications & What's Included
- Model: Smart550USB (SM4457)
- Series: AGSM500USBKJR6
- Input: 120V AC, 60 Hz, 10A
- UPS Output: 120V AC, 60 Hz
- VA Rating: 550 VA
- Watt Rating: 300 W
- Total output not to exceed 1170 W
- Outlets: 8 AC outlets (rear panel)
- Connectivity: USB port (rear panel)
- Form Factor: Desktop / Tower
- Front Panel: Power button, LED status indicators
- Certifications: FCC, UL Listed (UPS 1L91 E136918), NOM 1155, NYCE
- Country of Manufacture: China
- Battery: NOT included — requires compatible Tripp Lite replacement battery
- Includes: AC power cord
Applications
The Tripp Lite Smart550USB is a compact desktop UPS designed for home offices and small business workstations. Units in this class are used to keep desktop computers, monitors, network routers, and other sensitive electronics powered through brief outages and to provide clean, regulated power that protects against surges and brownouts. The USB interface allows the connected computer to communicate with the UPS for automatic safe shutdown when battery capacity runs low — a feature supported natively by most Windows and macOS systems. The Smart550USB line was a widely sold consumer-grade UPS during the 2000s and remains a practical choice for anyone who needs a simple, affordable standby UPS for a desktop PC or home networking setup. Because this unit ships without its internal battery, it is well-suited for buyers who already have a compatible Tripp Lite replacement battery on hand or who intend to source one separately.
This Tripp Lite Smart550USB (SM4457) UPS has been inspected and is in good used condition. Please note: this unit does not include a battery. Tripp Lite Smart550USB units require a specific replacement battery matched to the unit's voltage and connector — a standard generic battery may not fit. The chassis and outlets are intact, and the unit shows normal wear consistent with prior office use. Please view our photo set and contact us if you have any questions.
Warranty Information
Additional Information
Brand: |
Tripp Lite |
Model: |
Smart550USB |
MPN: |
SM4457 |
Secondary Model: |
AGSM500USBKJR6 |
Type: |
UPS / Uninterruptible Power Supply |
SKU: |
25778 |
Condition: |
Used – Inspected |
Seller Notes: |
Unit does not include a battery. Requires replacement battery with correct voltage and connector. |
Country/Region of Manufacture: |
China |
Form Factor: |
Desktop / Tower |
VA Rating: |
550 VA |
Power Output: |
300 W |
Input Voltage: |
120V AC, 60 Hz, 10A |
Output Voltage: |
120V AC, 60 Hz |
Power Requirements: |
120V AC, 60 Hz, 10A |
Total Output: |
Not to exceed 1170W |
Number of Outlets: |
8 |
Connectivity: |
USB |
Battery Included: |
No |
Certifications: |
FCC, UL Listed (UPS 1L91 E136918), NOM 1155, NYCE |
Condition Notes: |
Tripp Lite Smart550USB SM4457 UPS inspected and in good used condition. Does not include battery — requires a compatible replacement battery. Normal wear. Contact us with questions. |
