Year-End SaleEnds 1/1/26. Limited quantities. No rainchecks.

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 49 Showing 961-980 of 1,023 reviews
  • Rated 4 out of 5 stars

    it works

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

    itx build with 1080p monitor and a wireless hub is all i'm powering so batteries last about 30 minutes unplugged

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

    Gets the job done

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

    It's a battery backup, not an exciting item. Got it on sale, and it does what it is supposed to do.

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

    Did not work

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

    I have tried this one, but it did not meet my expectations. I can't recommend this brand. APC is the only one to buy

    No, I would not recommend this to a friend
  • Rated 4 out of 5 stars

    Works great but...

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

    Works as intended but it does do one odd thing and that is cause graphical power imperfections on my tv screen

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

    Power backup works as advertised.

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

    Used this battery back up on my phone. Worked fine but now useless as I upgraded to a newer phone.

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

    Good product with low backup

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

    Good product with low backup for less money. Nice alternate of buying individual Surge Protector.

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

    fits my needs

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

    Good back up for my home pc. like that it has consumer replaceable battery when the time comes.

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

    Great

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

    This is a very reliable product and I bought because I have had good experience with this brand.

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

    Just great!

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

    Easy to use, not as heavy as my older one. Great for where I live & all the power outages we have.

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

    Not sure what to expect

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

    I bought 2 CyberPower thinking that I would continue with power in case power was off, usually by a storm in my case. Not sure I got my laptop recharging or my TV screen working. When power goes off, the CyberPower triggers a noise alarm, that we had to manually cancel.

    No, I would not recommend this to a friend
  • Rated 4 out of 5 stars

    Bulky

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

    I really like it, but it is bulky. On the plus side, It fits every plug I need.

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

    I hope it works

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

    Never used one before I hope it works as it should when the time comes...

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

    Excellent Surge - Backup System

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

    Had this backup system only 3 weeks and it's working very well so far.

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

    Great power supply

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

    Great power supply. I like the fact that it has 12 ports to use.

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

    Great backup plenty of outlets

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

    Good backup wish there was more room between outlets for transformers

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

    Rated 2 out of 5 stars

    Has a lot of power outlets for other than computer

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

    wanted a small efficient power surge protector with a lot of power outlets for other than computer use. It was reasonably priced and not too bulky or space hogging. Haven't had a power surge yet but I know I will probably soon.

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

    Awesome Product

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

    Awesome product for the price and good quality. No problems so far.

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

    product bad Best Buy has zero customer service

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

    product bad came in plastic wrapper full of oil. Best Buy has zero customer service they insinuated that I put the oil in. I complained to corporate, no one ever contacted me!!!!!!!!!!!!!!!!!!!!!!! Doubt if they post this review.

    No, I would not recommend this to a friend
  • Rated 4 out of 5 stars

    Battery Backup

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

    Previous one died after 5 years so time for a new one

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

    Ok product

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

    Nice enough with a silence button. Seems to be working fine.

    I would recommend this to a friend