Last Chance 48-Hour Flash SaleEnds Dec. 24. Limited quantities.Shop now

Skip to content
Gift Ideas
Main Content

Customer Ratings & Reviews

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

Customer reviews

Rating 4.7 out of 5 stars with 1023 reviews

Rating Filter

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

Pros mentioned filter

Cons mentioned filter

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 28 Showing 541-560 of 1,023 reviews
  • Pros mentioned:
    Surge protection

    Rated 5 out of 5 stars

    works as expected

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

    Provides battery backup and surge protection for computer and related products.

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

    Rated 5 out of 5 stars

    Great battery for small application

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

    This unit will run my DVR,TV, alarm clock and three lights for several minutes when the power goes out.

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

    Rated 5 out of 5 stars

    Works as advertised

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

    This battery backup system protects my electronics and provides power when our electricity is out.

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

    Rated 5 out of 5 stars

    Great price and excellent quality!

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

    Has served me well for a couple years and still going strong!

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

    Just what I need

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

    We get power outages. I have a generator that kicks in 10 seconds later. That could be a rough few seconds without this unit. It's not just the outage but the unevenness of the voltage in transition. Also the generator voltage may be a tad uneven as various appliances kick in. This unit assures constant voltage no matter what else is happening. I have 2 units to protect both computers, which are in different rooms.

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

    Rated 5 out of 5 stars

    Great

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

    Good price just what we where looking for to replace ours that was hit by lighting.

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

    Rated 5 out of 5 stars

    Great Bsvkup

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

    The product does what it's supposed to do so far we'll see how it does during a hurricane

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

    Rated 5 out of 5 stars

    exactly what i needed for my computer to protect i

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

    I bought it to replace my old one that the battery had blown. It works great and price was good.

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

    Rated 5 out of 5 stars

    Does what it is suppose to

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

    Bought this for my desktop at work. Does what its suppose to and keeps my PC protected.

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

    Rated 5 out of 5 stars

    Great surge protector

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

    This surge protector accomodated all of the necessary plugs we needed for our computer system

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

    Rated 5 out of 5 stars

    Battery back up

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

    This product comes with a good warranty and lasts long if the power goes out.

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

    Rated 5 out of 5 stars

    Great for the price

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

    No issues and has helped save my Xbox from blowing any more power boxes during storms

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

    Good for fish tank

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

    We got this due to brown outages in our area to keep all of our fish tank stuff working so far so good had 3 with no problems only draw back is only 1/2 the plugs are for the battery back up.

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

    Rated 5 out of 5 stars

    great device

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

    Great brand of UPS. Really reliable. Works great. Glad to have bought the UPS.

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

    Rated 5 out of 5 stars

    Saved my file

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

    Had several power blips while working on unsaved new file. PC was not affected.

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

    Battery Back-up

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

    The 850va has plenty of plug receptacles to protect my devices. Easy to install.

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

    Great price for UPS with surge protection

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

    The product is pretty straight forward and easy to setup. Requires a full charge first before setting up, so don't get in a hurry. Have not been bothered by momentaries, since installing this.

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

    Space for all my devices

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

    I decided to buy another battery back up/surge protector for our computer, modem, WAP and a few other devices after a brief power outage that caused me to lose what I was working on. The problem with most devices is that there is not enough room for low-voltage device transformers. The Cyberpower 850 is one that does space the outlets to accommodate them. Battery seems powerful enough for our needs, too.

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

    Rated 5 out of 5 stars

    Awesome product

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

    Great product to use if the power goes out during a summer storm. My computer kept working.

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

    Rated 5 out of 5 stars

    Works Great!!!

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

    Exactly what was need for my server. Last longer than I had hoped for and a great price.

    I would recommend this to a friend