We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Compact black rectangular UPS with eight front outlets and NEMA 5-15P plug

CyberPower

CyberPower ST425 UPS 425VA 260W 120V 8 Outlets

SKU CH-5KQZ-P23W4 MPN ST425

A compact battery backup supplying 425 VA and 260 W with eight NEMA 5-15R outlets and 890-joule surge protection

  • International Version120V
  • Input Frequency47 - 63 Hz
  • Input ConnectionNEMA 5-15P
  • VA Rating425 VA
  • Watts260 Watts
  • Output Voltage120Vac +/- 5%

VA 425 VA

Struck-through versions exist but are not stocked here.

  • 425 VA capacity runs a desktop and router during outages
  • 260 watt output keeps essential gear powered through short cuts
  • eight NEMA 5-15R outlets protect computer, console and networking gear
  • 890 joule surge rating shields electronics from damaging spikes
  • simulated sine wave topology delivers clean battery power for safe shutdown

Compact Standby UPS for Home Office

The CyberPower ST425 is a 425 VA / 260 W standby uninterruptible power supply designed for desktop computers, routers and entertainment devices. It provides battery backup and surge protection from a single 120 V NEMA 5-15P input. Eight NEMA 5-15R outlets give room for a typical workstation plus networking gear. The sealed lead-acid battery is replaceable by a qualified technician.

Simulated Sine Wave and Surge Protection

Output voltage is regulated to 120 Vac ±5 % with a simulated sine waveform at 50/60 Hz ±1 %. The unit delivers 1.5 minutes of runtime at full 260 W load and 6 minutes at half load, enough for an orderly shutdown. A surge energy rating of 890 joules and internal circuitry limiting protect connected equipment from spikes. Audible alarms signal on-battery, low-battery, overload and fault conditions.

Eight Outlets and Replaceable Battery

All eight outlets supply battery-backed power so every plugged-in device stays alive during an outage. Recharge takes 8 hours after a discharge event. The replaceable battery design extends the service life of the unit without replacing the whole UPS. UL 1778, cUL, FCC Class B, CEC and RoHS compliance confirm the unit meets recognised safety and emissions standards for office use.

Highlights

  • 425 VA capacity runs a desktop and router during outages
  • 260 watt output keeps essential gear powered through short cuts
  • eight NEMA 5-15R outlets protect computer, console and networking gear
  • 890 joule surge rating shields electronics from damaging spikes
  • simulated sine wave topology delivers clean battery power for safe shutdown

Specifications

BrandCyberPower
SeriesStandby UPS Series
ModelST425
International Version120V
Input Frequency47 - 63 Hz
Input ConnectionNEMA 5-15P
VA Rating425 VA
Watts260 Watts
Output Voltage120Vac +/- 5%
Output Frequency50/60 Hz +/- 1%
Outlets8
Outlet TypeNEMA 5-15R
Battery TypeSealed Lead Acid
Battery Run TimeRuntime at Full Load: 1.5 min
Runtime at Half Load: 6 min
Battery Recharge Time8 Hours
Battery ReplaceableReplaceable by qualified technician
AlarmsOn Battery
Low Battery
Overload
Fault
ApprovalsUL1778
cUL
FCC DOC Class B
CEC
RoHS Compliant
Surge Energy Rating890 Joules
ProtectionInternal Circuitry Limiting
Circuit Breaker Protected
TemperatureOperating Relative Humidity: 0 - 95 % (non-condensing)
Storage Elevation: 0 - 50000 ft (0 - 15239 m)
HumidityOperating Relative Humidity: 0 - 95 % (non-condensing)
Storage Temperature: 5 - 113°F (-15 - 45°C)
FeaturesSimulated Sine Wave Output
GreenPower UPS High-Efficiency Design
Transformer-Spaced Outlets
ENERGY STAR
Connected Equipment Guarantee
Dimensions8.30" x 4.50" x 3.20"
Weight3.80 lbs.
Package ContentsUPS System, User Manual
Shipping weight1.91 kg
Package size330 × 170 × 114 mm

Other versions of this model

2 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

How do I install the ST425 UPS, and what step do people often miss?

Plug the NEMA 5-15P input into a grounded 120V wall outlet, then connect devices to the eight NEMA 5-15R outlets. The step often missed is allowing the sealed lead-acid battery to charge for the full 8 hours before relying on backup power.

What maintenance or replacement will the ST425 need later?

The sealed lead-acid battery is replaceable by a qualified technician. Plan to swap it when runtime at full load drops below the rated 1.5 minutes or after roughly three to five years of service.

What limit appears first during a prolonged outage on the ST425?

At full 260W load the battery lasts only 1.5 minutes, so runtime is the first constraint. At half load you gain about 6 minutes before the low-battery alarm sounds.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.