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CyberPower ST900U Standby UPS Battery Backup and Surge Protector
✅ In stock
D
Grade
Analysis Confidence
100%
⚠️ Price may have changed. Last updated 24+ hours ago — confirm on Amazon.
Check Deal at Amazon
Price verified Sep 17, 2026 4:11 AM · Prices & availability subject to change
Is This a Good Price on Amazon?
😐 Weak Deal- 😐Verdict: Weak Deal. Marginal discount. Prices may drop further soon.
- 💰The price is modestly below what this product ordinarily sells for.
- 🏷️The listed retail price is trimmed by 14% at checkout.
- 📉Going back roughly eight months, a more competitive price has not appeared — this stands out as a strong value by recent standards.
- ➡️Pricing has held fairly steady, with no strong push in either direction.
How We Scored This Deal
Price Competitiveness
8.42/28
Recent Value
1.56/22
Market Standing
5.57/20
Deal Strength
13/20
Momentum
4/10
📝 Product Overview
🏪 Sold by
Amazon.com
🚚 Shipping
Free Shipping
Product Details
✓900VA/500W Slim Profile Standby Uninterruptible Power Supply (UPS): Uses simulated sine wave output to provide battery backup power and to safeguard home office, home entertainment including computers, gaming consoles, and broadband routers
✓12 NEMA 5-15R OUTLETS: Six battery backup & surge protected outlets; Six surge protected outlets; Four outlets are widely spaced to accommodate larger plugs; INPUT: NEMA 5-15P right angle, 45 degree offset plug with five foot power cord
✓GREENPOWER UPS HIGH EFFICIENCY DESIGN: Reduces power consumption by utilizing a compact charger and power inverter to create an ultra-efficient backup power system for home and office use
✓3-YEAR WARRANTY – INCLUDING THE BATTERY; $125,000 Connected Equipment Guarantee; FREE PowerPanel Management Software (Download); UL SAFETY CERTIFIED: Product has been tested in a UL certified lab and listed with UL as meeting or exceeding safety standards
⚙️ Specifications
Brand
CyberPower
Battery Cell Composition
Other Than Listed
Product Dimensions
7"D x 12.2"W x 3.1"H
Voltage
120 volts
Color
Black
Item Weight
7.7 pounds
ASIN
B07GZT2QW7
Item model number
ST900U
Batteries
1 12V batteries required.
Customer Reviews
4.5 4.5 out of 5 stars (914) var dpAcrHasRegisteredArcLinkClickAction; P.when('A', 'ready').execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( 'acrLink-click-metrics', 'click', { "allowLinkDefault": true }, function (event) { if (window.ue) { ue.count("acrLinkClickCount", (ue.count("acrLinkClickCount") || 0) + 1); } } ); } }); P.when('A', 'cf').execute(function(A) { A.declarative('acrStarsLink-click-metrics', 'click', { "allowLinkDefault" : true }, function(event){ if(window.ue) { ue.count("acrStarsLinkWithPopoverClickCount", (ue.count("acrStarsLinkWithPopoverClickCount") || 0) + 1); } }); }); 4.5 out of 5 stars
Best Sellers Rank
#3 in Computer Uninterruptible Power Supply Units
