Specifications

General
General Amazon Basics UPS 400VA Black
Brand
Amazon Basics
Brand
Amazon Basics
Power
Power Amazon Basics UPS 400VA Black
VA Rating
400VA
Wattage
255 W
47% better than others
Number of Outlets
6
Battery Backup Outlets
3
Surge Only Outlets
3
Runtime at 100W
Approx. 6 minutes (at 127.5W)
Protection
Protection Amazon Basics UPS 400VA Black
Surge Protection
Yes
77% have it
Features
Features Amazon Basics UPS 400VA Black
Output power capacity
255 W
29% better than others
Output power
255 W
93% better than others
Audible alarm(s)
Yes
79% have it
UPS topology
Standby
Input operation voltage (min)
120 V
33% better than others
Input operation voltage (max)
120 V
79% better than others
Input frequency
50Hz / 60Hz
EMI/RFI noise filtering
Yes
84% have it
Surge protection
Yes
57% have it
Power protection features
Battery Backup, Surge Protection
Waveform
Simulated Sine Wave
Output frequency
50Hz / 60Hz
Automatic Voltage Regulation (AVR)
No
20% do not have it
Emergency Power Off (EPO)
No
14% do not have it
Auto-restart
Yes
77% have it
Overload protection
Yes
68% have it
Over current protection
Yes
76% have it
Output voltage
120 V
49% better than others
Maintenance-free
Yes
68% have it
Surge protection features
Yes
57% have it
Number of input phases
1
Number of output phases
1
Detachable power cord
No
8% do not have it
Power source type
Battery, Mains
Auto-restart
Yes
74% have it
Carrying handle(s)
No
19% do not have it
Output power
255 W
27% better than others
Audible alarm(s)
Yes
89% have it
Surge protection
Yes
59% have it
Power protection features
Battery Backup, Surge Protection
Input frequency
50Hz / 60Hz
Output frequency
50Hz / 60Hz
EMI/RFI noise filtering
Yes
77% have it
Maintenance-free
Yes
78% have it
Web-based management
No
10% do not have it
Output power capacity
255 W
76% better than others
UPS topology
Standby
Input operation voltage (min)
120 V
76% better than others
Input operation voltage (max)
120 V
61% better than others
Waveform
Simulated Sine Wave
Automatic Voltage Regulation (AVR)
No
30% do not have it
Emergency Power Off (EPO)
No
41% do not have it
Ports & interfaces
Ports & interfaces Amazon Basics UPS 400VA Black
USB 2.0 ports quantity
0
AC outlet types
NEMA 5-15R
Power plug
NEMA 5-15P
AC outlets quantity
6
Ethernet LAN (RJ-45) ports
0
USB port
No
37% do not have it
Serial interface
No
45% do not have it
Number of type F outputs
0
Parallel ports quantity
0
Battery
Battery Amazon Basics UPS 400VA Black
Battery technology
Sealed Lead-Acid
Typical backup time at full load
1.5 minutes
Typical backup time at half load
6 minutes
Hot-swap battery
No
38% do not have it
Number of batteries included
1
Cold start
Yes
64% have it
Automatic battery test
Yes
57% have it
Battery technology
Sealed Lead-Acid
Number of batteries included
1
Hot-swap battery
No
39% do not have it
Typical backup time at full load
1.5 Minutes
Typical backup time at half load
6 Minutes
Cold start
Yes
64% have it
Automatic battery test
Yes
60% have it
Design
Design Amazon Basics UPS 400VA Black
Cable length
5 Ft
Product colour
Black
LED indicators
Yes
66% have it
Form factor
Compact
Housing material
ABS Plastic
Operational conditions
Operational conditions Amazon Basics UPS 400VA Black
Operating temperature (T-T)
0 - 40 °C
Storage temperature (T-T)
-15 - 50 °C
Operating relative humidity (H-H)
0 - 95%
Storage relative humidity (H-H)
0 - 95%
Packaging data
Packaging data Amazon Basics UPS 400VA Black
Package type
Retail
Software CD
Yes (Downloadable)
Package type
Retail
Bundled software
Power Management Software Download
Software CD
Yes (Downloadable)
Other features
Other features Amazon Basics UPS 400VA Black
Output connections
3x Battery Backup, 3x Surge Protected
Input connection type
NEMA 5-15P
Nominal output voltage
120 V
22% better than others
Nominal input voltage
120 V
80% better than others
Filtering
EMI/RFI
Battery type
Sealed Lead-Acid
Non-operating relative humidity (non-condensing)
0 - 95%
Packaging content
UPS unit, manual, power management software download
I/O ports
6x NEMA 5-15R outlets
Packaging content
Packaging content Amazon Basics UPS 400VA Black
Cables included
1x Power Cord
Manual
Yes
81% have it
Batteries included
Yes
85% have it
Quick installation guide
Yes
82% have it
Design
Design Amazon Basics UPS 400VA Black
Form factor
Compact
Product colour
Black
Compatibility
Home Networks, IoT Devices, Home Entertainment Devices
LED indicators
Yes
77% have it
Cable length
5 Ft
Built-in fan
No
29% do not have it
Operational conditions
Operational conditions Amazon Basics UPS 400VA Black
Operating temperature (T-T)
0 - 40 °C
Storage temperature (T-T)
-15 - 50 °C
Operating relative humidity (H-H)
0 - 95%
Storage relative humidity (H-H)
0 - 95%
Packaging content
Packaging content Amazon Basics UPS 400VA Black
Manual
Yes
55% have it
Batteries included
Yes
59% have it
Cables included
1x Power Cord
Quick installation guide
Yes
77% have it
Ports & interfaces
Ports & interfaces Amazon Basics UPS 400VA Black
USB port
No
40% do not have it
AC outlets quantity
6
AC outlet types
NEMA 5-15R
Power plug
NEMA 5-15P
Serial interface
No
25% do not have it
SmartSlot
No
23% do not have it
Other features
Other features Amazon Basics UPS 400VA Black
I/O ports
6x NEMA 5-15R Outlets
Packaging content
UPS Unit, Manual, Power Management Software Download
Output voltage
120 V
27% better than others
Non-operating relative humidity (non-condensing)
0 - 95%
Overload protection
Yes
59% have it
Output connections
3x Battery Backup, 3x Surge Protected
Input connection type
NEMA 5-15P
Nominal output voltage
120 V
36% better than others
Nominal input voltage
120 V
25% better than others
Filtering
EMI/RFI
Battery type
Sealed Lead-Acid
Over current protection
Yes
91% have it
Output connection type
NEMA 5-15R
Disclaimer: Information on this page may need review. If you notice any discrepancies, please report them
Nolan Brooks
Reviewed by
Nolan Brooks Storage Systems Analyst & Network Engineer Versus Wizard

The Amazon Basics UPS unit features a compact, rectangular black casing designed for discreet placement in home or office environments. Constructed primarily from durable ABS plastic, it offers a functional and understated aesthetic. The unit measures to integrate easily into various setups, and its build quality appears adequate for its intended protective purpose, housing six NEMA 5-15R outlets.

This 400VA/255W standby UPS provides essential power protection, delivering approximately 1.5 minutes of runtime at full load (255W) and around 6 minutes at half load (127.5W). It offers three surge-protected outlets and three battery-backup/surge-protected outlets, ensuring connected devices receive consistent power during short outages and enough time for graceful shutdown during extended events. The input specifications indicate compatibility with 120V at 50Hz/60Hz frequencies, with a 5-foot cord and a right-angle plug.

Compared to higher-end line-interactive or online UPS systems, this standby model offers a more basic level of protection and shorter runtime, making it less suitable for critical servers or high-demand workstations. However, for protecting home networks, IoT devices, or standard home entertainment equipment against common power fluctuations and brief outages, it represents a cost-effective solution. Consumers requiring extended battery life or advanced management features should consider more robust models.

Pros & Cons

Pros
What we love about this product
  • Compact and unobtrusive design.
  • Offers both surge protection and battery backup.
  • Economical choice for basic device protection.
  • Provides adequate runtime for safe shutdown.
Cons
Points to consider before buying
  • Limited runtime at higher loads.
  • Standby topology offers less advanced protection than line-interactive or online UPS.
  • No advanced network management features included.

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