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Customer Ratings & Reviews

Your price for this item is $62.99
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The comparable value price is $89.99

Customer reviews

Rating 4.7 out of 5 stars with 1023 reviews

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Rating by feature

  • Value

    Rating 4.6 out of 5 stars

  • Quality

    Rating 4.7 out of 5 stars

  • Ease of Use

    Rating 4.7 out of 5 stars

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97%would recommend to a friend

Customers are saying

Customers express satisfaction with the 850VA Battery Back-Up System's long battery life, reliable performance, and effective surge protection. Many appreciate its reasonable price, ample outlets, and ease of use, finding it straightforward to set up and operate. The unit's size is also frequently praised as manageable. A minor drawback mentioned by some customers is the system's weight.

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 25 Showing 481-500 of 1,023 reviews
  • Pros mentioned:
    Battery life

    Rated 4 out of 5 stars

    Working very good.

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

    So far so good. I haven't used Cyperpower brand before but it seems to be working well given that I have two 27" monitors connected, pc and wireless mouse and keyboard. When my power went out, all these devices remained connected no problem.

    I would recommend this to a friend
  • Pros mentioned:
    Battery life

    Rated 5 out of 5 stars

    Great Battery Backup

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

    This UPS has AVR & great spacing of outlets. Great price & battery lasts longer than most available in this price range.

    I would recommend this to a friend
  • Pros mentioned:
    Battery life

    Rated 5 out of 5 stars

    Excellent Battery & Backup

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

    Excellent Battery & Backup, I was having problems with the other major brand, but with this battery, everything is normal again.

    I would recommend this to a friend
  • Rated 4 out of 5 stars

    Performs as expected

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

    Works fine just plugged in and let it charge and then plugged in PC etc.

    I would recommend this to a friend
  • Pros mentioned:
    Surge protection

    Rated 5 out of 5 stars

    so far so good

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

    Bought this because I live in Florida with constant power outages and surges. Wanted to protect my computer. Works as promised.

    I would recommend this to a friend
  • Pros mentioned:
    Battery life

    Rated 5 out of 5 stars

    Works Great

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

    With all the power outages we have the 850VA Battery Backup System really works great we never had a problem again.

    I would recommend this to a friend
  • Pros mentioned:
    Battery life

    Rated 5 out of 5 stars

    good

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

    got this one to replace my old old one. it seems to be working good. we have not had any power outages. which is fine with me.

    I would recommend this to a friend
  • Pros mentioned:
    Battery life

    Rated 5 out of 5 stars

    Great UPS

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

    Lose power all the time but this saves the day. Allows you to safely shut off your equipment. No short circuits.

    I would recommend this to a friend
  • Pros mentioned:
    Price

    Rated 5 out of 5 stars

    Big boy UPS options, little price

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

    Has everything I usually need on high wattage UPS units. However, about half the price of most powerful UPS units. Great value!

    I would recommend this to a friend
  • Pros mentioned:
    Battery life

    Rated 5 out of 5 stars

    Does what it is supposed to do.

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

    Provided battery backup for my computer when the power went out. I am going to purchase another one for my TV and accessories.

    I would recommend this to a friend
  • Pros mentioned:
    Surge protection

    Rated 5 out of 5 stars

    Step up from my previous moel

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

    This UPS has five surge and battery outlets and six surge. Their warrantee adds to the value of this unit.

    I would recommend this to a friend
  • Rated 4 out of 5 stars

    Works Well

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

    It works well. The only downside is that only one side has battery backup.

    I would recommend this to a friend
  • Rated 4 out of 5 stars

    Good back up pack

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

    It does a good job keeping my business alive in case of an power outage

    I would recommend this to a friend
  • Pros mentioned:
    Surge protection

    Rated 5 out of 5 stars

    Peace of mind.

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

    Got to have this to protect my big screen tv and my gaming rig incase of a power surge. Better safe then sorry.

    I would recommend this to a friend
  • Pros mentioned:
    Price

    Rated 5 out of 5 stars

    Good backup at reasonable price

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

    Need to keep computer safe during lightening storms and power outages and this is a quality product at a reasonable price.

    I would recommend this to a friend
  • Pros mentioned:
    Surge protection

    Rated 5 out of 5 stars

    Excellent unit

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

    Works as advertised. Protects your valuable computer equipment from surges and spikes.

    I would recommend this to a friend
  • Rated 4 out of 5 stars

    Great Product!

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

    Love the product, works really well. Was so easy shopping BestBuy.com!

    I would recommend this to a friend
  • Rated 4 out of 5 stars

    Had enough plug-ins

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

    Poor Software for MAC better for PC (but who uses Microsoft Produces?)

    I would recommend this to a friend
  • Rated 3 out of 5 stars

    Okay for a short time

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

    This is a good backup if you only need it for a few minutes while power is out. So I exchanged for the 2500...

    I would recommend this to a friend
  • Rated 4 out of 5 stars

    Works well as a simple UPS

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

    No frills, no LCD, but a simple UPS for a Gaming machine

    I would recommend this to a friend