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Customer Ratings & Reviews

Your price for this item is $84.99

Customer reviews

Rating 4.7 out of 5 stars with 1781 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

Pros mentioned filter

Cons mentioned filter

95%would recommend to a friend

Customers are saying

Customers have good things to say about the 650VA Battery Back-Up System, especially its long battery life, overall performance, and ease of use. Many appreciate the reasonable price and adequate surge protection, as well as its convenient size and handy USB ports. Some customers have noted minor issues such as a slight humming noise and, in rare cases, random alarm activations. A few have mentioned its weight and isolated incidents of overheating.

This summary was generated by AI based on customer reviews.

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 87 Showing 1,721-1,740 of 1,781 reviews
  • Rated 1 out of 5 stars

    Did not last a year

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    Posted . Owned for 10 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    I have lost power a couple times since I've had this back up and each time it worked like a charm. I lost power briefly today and the battery backup did not kick on. It continued to screech with a high pitched tone till I reset it. I have only had for 10 months and this is unacceptable. Will not use this brand again. I had much better luck with the competitor brand.

    No, I would not recommend this to a friend
    • Brand response from TechSupport
      Posted .

      Hello, Frequent use on any device is going to wear out the battery, however ,the SX650U comes with a 3 year warranty. Please reach out to our support team at 877-297-6937 and we'd be happy to assist. We hope to hear from you! CyberPower

  • Rated 5 out of 5 stars

    Works well

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

    The unit runs quietly, and has worked well. I have not had a power outage yet so I cannot comment on the length of time it will last.

    I would recommend this to a friend
  • Rated 5 out of 5 stars

    Great protection for my systems

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

    I can count on this Cyberpower UPS when we get sudden power outages to keep my electronics from getting fried.

    I would recommend this to a friend
  • Rated 5 out of 5 stars

    Features I Like

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

    Bought this type of Battery Backup for the Auto Shutdown. Tested and Works well. Great Product.

    I would recommend this to a friend
  • Rated 2 out of 5 stars

    Hard to use.

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

    Seems like a simple enough idea, but I can't get this product to work right. I'll have to go through the on-line resources to figure out a simple appearing item.

    No, I would not recommend this to a friend
    • Brand response from TechSupport
      Posted .

      Hello husker8,
      Thank you for taking the time to write a review. Our technical support team is always happy to help, please contact us at 1.877.297.6937. We look forward to hearing from you!

  • Rated 1 out of 5 stars

    Battery Backup Surge Protector

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

    Item does not work for what I bought it for. Our electric went out and the modem on my computer shut down. I work from home and need the system to stay up. At least long enough for me to save work and close out correctly.

    No, I would not recommend this to a friend
    • Brand response from TechSupport
      Posted .

      Sorry to hear you are having issues with your unit, these devices have a 3 year warranty from date of purchase, if you contact our Technical Support team at 1-877-297-6937 and select option 1, we may be able to replace it for you under warranty. Thank you for your review Sandy! CyberPower

  • Rated 2 out of 5 stars

    do it yourself curbside pickup

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

    had to go into store and item not brought to car. typical for bailey’s crossroads store.

    I would recommend this to a friend
  • Rated 1 out of 5 stars

    Failed after 18 months and ruined my data

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

    Failed after 18 months: Instead of protecting my system, it failed and corrupted the database of my home automation system by abruptly cutting off power, signaled by a continuous beep alert during the failure.

    No, I would not recommend this to a friend
    • Brand response from TechSupport
      Posted .

      Hello Evan, the constant tone coming from the UPS indicates the UPS was overloaded and shut down power to the connected equipment. This happens when to much wattage is being drawn from the UPS. We recommend moving a device to the surge only side to not continue to overload the UPS. Please contact our technical support if you have any questions or concerns regarding the product at 1.877.297.6937 and dial 1 for technical support. CyberPower

  • Pros mentioned:
    Surge protection

    Rated 1 out of 5 stars

    This is my worst Bestbuy purchase to date.

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    Posted . Owned for 4 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    The battery side does not work. If you need a surge protector with 4 functional outlets, this is it.

    No, I would not recommend this to a friend
  • Rated 2 out of 5 stars

    Not happy

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

    Very dissatisfied, after one year I had to replace the battery. The manufacture cannot respond.

    No, I would not recommend this to a friend
    • Brand response from TechSupport
      Posted .

      Hello Steve,
      The SX650U comes with a 3 year warranty from date of purchase. Did you open a ticket on the Cyber Power website or call our support line? The technical support team is very responsive. Please reach out to us at 877-297-6937 and we'd be happy to assist. We hope to hear from you! CyberPower

  • Rated 4 out of 5 stars

    Good product

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

    Good product, i recommend it to anyone loolking for a usp

    I would recommend this to a friend
  • Rated 2 out of 5 stars

    Meh

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

    Power button doesn’t work. I have to unplug the router and modem to make it work. Not much quality control

    No, I would not recommend this to a friend
    • Brand response from TechSupport
      Posted .

      If the unit is not working as it should, please reach out to our support team at 877-297-6937 and we'd be happy to assist. We hope to hear from you! CyberPower

  • Rated 2 out of 5 stars

    It is what it is

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

    not even a year after purchased randomly started beeping and shut everything down

    No, I would not recommend this to a friend
    • Brand response from TechSupport
      Posted .

      Hello Mrco,
      The SX650U comes with a 3 year warranty from date of purchase. Please reach out to our support team at 877-297-6937 to provide more detail and we'd be happy to assist. We hope to hear from you! CyberPower

  • Rated 2 out of 5 stars

    Could be better

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

    Could be better, in a storm it did not perform as expected.

    No, I would not recommend this to a friend
    • Brand response from TechSupport
      Posted .

      Sorry to hear that; We would like to know more about what happened. Please reach out to our support team at 877-297-6937 and we'd be happy to assist. Thank you for your review! CyberPower

  • Rated 1 out of 5 stars

    Poor operation

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

    I purchased this battery backup system to keep my modem in operation during a power outage and it only keeps power on for about 8 minutes. The first one died after a couple of weeks of operation and the replacement is almost worthless.

    No, I would not recommend this to a friend
    • Brand response from TechSupport
      Posted .

      Hello Antany,
      Have you reached out to our support team? If not, please contact us at 877-297-6937 and we'd be happy to assist. We hope to hear from you! CyberPower

  • Cons mentioned:
    Noise

    Rated 1 out of 5 stars

    Starts beeping with any surge

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

    And it won't shut up!!! Can't return it because I don't waited too long to use it.

    No, I would not recommend this to a friend
  • Rated 1 out of 5 stars

    Battery went dead in two months.

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

    I registered the product and contacted CyberPower, the manufacturer and they are replacing the unit with a new one. This one may have just been defective, so I can't speak for all of them.

    No, I would not recommend this to a friend
    • Brand response from TechSupport
      Posted .

      Hey Selfemployed,
      Thank you for taking the time to write a review. We apologize for any inconvenience this has caused, please let us know if we can be of any further assistance. Feel free to contact us at 1-877-297-6937 (press 1).

  • Rated 2 out of 5 stars

    why did i buy it

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

    i dont see the point in this. im mad at myself for buying this

    No, I would not recommend this to a friend
    • Brand response from TechSupport
      Posted .

      Hello Shamel, Whether the unit is not working properly or if you have questions about UPS units in general, if you'd like to reach out to our support team at 877-297-6937 we'd be more than happy to assist. We hope to hear from you! CyberPower

  • Rated 4 out of 5 stars

    small ups

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

    This a small ups used to power the digital cable booster during power outages

    I would recommend this to a friend
  • Rated 1 out of 5 stars

    CyberPower battery

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

    I had this product for less then 1 month when it quit communicating with my compute. This is the 2nd Cyberpower battery I have tried and in both cases it works for a very short period and then quits communicating. This leaves me with an expensive surge board and no back up battery.

    No, I would not recommend this to a friend