Skip to contentGo to Product Search
Main Content

Customer Ratings & Reviews

No content
  • Front. CyberPower - 650VA Battery Back-Up System - Black.
  • Alt View 11. CyberPower - 650VA Battery Back-Up System - Black.
  • Alt View 12. CyberPower - 650VA Battery Back-Up System - Black.
  • Alt View 13. CyberPower - 650VA Battery Back-Up System - Black.
  • Alt View 14. CyberPower - 650VA Battery Back-Up System - Black.

CyberPower - 650VA Battery Back-Up System - Black

Model:
SX650U
SKU:
10839887
$69.98
Save $15.01
Comp. Value: $84.99

Customer reviews

Rating 4.7 out of 5 stars with 1783 reviews

Rating Filter

Rating by feature

  • Value

    Rating 4.6 out of 5 stars

  • Quality

    Rating 4.6 out of 5 stars

  • Ease of Use

    Rating 4.8 out of 5 stars

95%
would recommend
to a friend
The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.
Page 73 Showing 1,441-1,460 of 1,783 reviews

  • Great battery backup

    |
    |
    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Have always used CyberPower Backup Systems. The last one lasted for 20 years before the battery failed.

    This review is from CyberPower - 650VA Battery Back-Up System - Black

    I would recommend this to a friend

  • Works as advertised

    |
    |
    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Purchased and had a power outage about a week later and computer held up and software gave me battery percentage and was able to save document and shutdown machine gracefully

    This review is from CyberPower - 650VA Battery Back-Up System - Black

    I would recommend this to a friend

  • Great upgrade

    |
    |
    Posted . Owned for 3 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Bought for use at home during COVID 19 so I wouldn’t have data loss in case of power failure.

    This review is from CyberPower - 650VA Battery Back-Up System - Black

    I would recommend this to a friend

  • Great UPS !

    |
    |
    Posted . Owned for 3 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    What Else can be said, perfect UPS for south Florida where daily thunderstorms can cause brown outs.

    This review is from CyberPower - 650VA Battery Back-Up System - Black

    I would recommend this to a friend

  • Great item for power surge fear

    |
    |
    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    My city has very frequent power outages & this item rests our mind of a power outage!!!

    This review is from CyberPower - 650VA Battery Back-Up System - Black

    I would recommend this to a friend

  • Backup Battery

    |
    |
    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    So far to works great. Use it for a mixing board power supply and it has been great thus far.

    This review is from CyberPower - 650VA Battery Back-Up System - Black

    I would recommend this to a friend

  • Easy to setup, dependable UPS

    |
    |
    Posted . Owned for 2 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    This UPS is a convenient size, easy to set up and so far is dependable. What more could you ask for?!

    This review is from CyberPower - 650VA Battery Back-Up System - Black

    I would recommend this to a friend

  • A Great UPS

    |
    |
    Posted . Owned for 2 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Perfect UPS - great for that added piece of mind, and nice features for the price

    This review is from CyberPower - 650VA Battery Back-Up System - Black

    I would recommend this to a friend

  • Good buy

    |
    |
    Posted . Owned for 2 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Works well for for work station for power output and price. Used for quick update when power goes out.

    This review is from CyberPower - 650VA Battery Back-Up System - Black

    I would recommend this to a friend

  • Great back up system for our home

    |
    |
    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    This is a great back up system for our home to make sure we are always up and running!

    This review is from CyberPower - 650VA Battery Back-Up System - Black

    I would recommend this to a friend

  • UPS OK, Software is not very good at all.

    |
    |
    Posted . Owned for 1.5 years when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    As a UPS/Battery backup, this unit works fine. HOWEVER, if you want to use it to shut down a PC if power starts to run low, it does NOT work very well. After a power hit, the software gets confused, and at the end of a timed period IT DROPS POWER COMPLETELY WITHOUT WARNING. Their support people think that is a feature, I see it as a MAJOR FLAW. So, if you want to use it without hooking up to a USB port, its fine, otherwise, bewere.

    This review is from CyberPower - 650VA Battery Back-Up System - Black

    No, I would not recommend this to a friend

  • Works well

    |
    |
    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Priced right and works well. Construction of it is acceptable. Much cheaper than the big brand.

    This review is from CyberPower - 650VA Battery Back-Up System - Black

    I would recommend this to a friend

  • Good basic back up

    |
    |
    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Too early to comment on the longevity of the battery performance but pretty decent for the price so far. Never used cyber power before, always been an APC customer.

    This review is from CyberPower - 650VA Battery Back-Up System - Black

    I would recommend this to a friend

  • Great battery protection

    |
    |
    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    The unit is more capable of handling the load of the family computer. Much better then the old 450va we had.

    This review is from CyberPower - 650VA Battery Back-Up System - Black

    I would recommend this to a friend

  • Handles so far

    |
    |
    Posted . Owned for 11 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Hopefully actually can handle power surges so far its good

    This review is from CyberPower - 650VA Battery Back-Up System - Black

    I would recommend this to a friend

  • Great battery backup.

    |
    |
    Posted . Owned for 3 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Ordered it and picked it up an hour or so later. Easy as pie to do. Great job Best Buy.

    This review is from CyberPower - 650VA Battery Back-Up System - Black

    I would recommend this to a friend

  • Great idea but needs work

    |
    |
    Posted . Owned for 2 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Didn't work as expected. Didn't charge well. Didn't do what I needed to, might work for you.

    This review is from CyberPower - 650VA Battery Back-Up System - Black

    No, I would not recommend this to a friend

  • Does it’s job

    |
    |
    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Does it’s job! Good amount of outlets and the 2 USB ports are a great addition.

    This review is from CyberPower - 650VA Battery Back-Up System - Black

    I would recommend this to a friend

  • Great back up

    |
    |
    Posted . Owned for 3 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Perfect for any office or game room to protect computers.dvrs. audio n video recorders

    This review is from CyberPower - 650VA Battery Back-Up System - Black

    I would recommend this to a friend

  • Ups

    |
    |
    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Unit works well and is well designed. Plug placement layout is well thoughtout.

    This review is from CyberPower - 650VA Battery Back-Up System - Black

    I would recommend this to a friend
Page 73, Showing 1,441-1,460 of 1,783 reviews
Sign in or Create Account

Get the latest deals and more.

Best Buy appLearn more
Share on YouTubeShare on InstagramShare on TikTokShare on FacebookShare on PinterestShare on X
Best Buy Canada
AccessibilityTerms & ConditionsPrivacyInterest-Based AdsState Privacy RightsHealth Data PrivacyDo Not Sell/Share My Personal InformationLimit Use of My Sensitive Personal InformationTargeted Advertising Opt OutCA Supply Chain Transparency Act
In-store pricing may vary. Prices and offers are subject to change. © 2026 Best Buy. All rights reserved. BEST BUY, the BEST BUY logo, the tag design, and MY BEST BUY are trademarks of Best Buy and its affiliated companies.