Last-Minute SavingsLimited 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 2 Showing 21-40 of 1,023 reviews
  • Rated 5 out of 5 stars

    Easy to connect to system.

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

    Easy to connect to computer system and establish control parameters for shut down sequence during power failure. I control my main PC as well as internet modem, wireless router and Verizon cell phone booster. This essentially eliminates nuisance loss of internet signal due to power flicks and surges during storms or power grid fluctuations.

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

    Rated 5 out of 5 stars

    Excellent Battery Back-up Product

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

    Really like that this battery back- up has six battery / surge protection outlets and six surge protection only outlets. Twelve outlets handled all my needs.

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

    Rated 5 out of 5 stars

    Highly recommend

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

    Replaced older version with less outlets. Works very well. Easy to install. Outlets nicely spaced out for larger hookups.

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

    Rated 5 out of 5 stars

    Great Battery Backup

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

    The battery backup is great, has over an hour support for my computer and also provides surge support

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

    Rated 5 out of 5 stars

    Good unit

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

    Easy set up. Convenient that it can be placed flat or stood upright to save space. Plenty of outlets.

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

    Rated 5 out of 5 stars

    I like its many outlets

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

    Simple to use and troubleshoot; extra large capacity, think it is dependable.

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

    Rated 5 out of 5 stars

    CyberPower ups

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

    Easy to setup. Everything I need to keep computer, accessories, and phone line safe from power outages and spikes

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

    Rated 5 out of 5 stars

    Replaced my dead APC

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

    I have always purchased APC products but decided to see what else was available. After doing considerable research everything I read about CyberPower was very positive and equal to APC products. Now that I am retired I look for good products that offer better value. This CyberPower unit matched my requirements and cost less than the comparable APC unit. As of today I am very satisfied with this purchase and highly recommend people look at CyberPower.

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

    Rated 5 out of 5 stars

    Lots of outlets

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

    Great battery back up. Lots of outlets. I purchased 2 to replace the two older models that I had.

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

    Rated 5 out of 5 stars

    Best bang for your buck

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

    Can't beat the price vs the amps and battery time on this unit. More backup time for less money

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

    Rated 5 out of 5 stars

    Exactly what I wanted!

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

    My old battery backup system was failing and starting blinking lights at me. Off to Best Buy to find an exact copy of my 5 old year old unit. No such luck. Technology has improved and I purchased one even better with more outlets and explanations on how to use them efficiently. The price was the same as the unit from 5 years ago since I checked my old receipt. Again my equipment is safe from brown outs and power failures..

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

    Rated 5 out of 5 stars

    Battery Backup

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

    Seems great o far, much better in price than the last one I bought,with all the same stats

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

    Rated 5 out of 5 stars

    Great item

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

    Great back up for the price. Has enough plugs and protection for what I need.

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

    Impressed

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

    I almost spent $60.00 more then I needed to. I was in between buying this unit or another unit that was $60.00 more. I did not want to under purchase. Confused. I decided to contact the Best Buy online support tech. I thought for sure he was going to say "go ahead and purchase the more expensive unit!" Instead, he ended up spending about twenty minutes asking what equipment I was planning to protect. After reviewing the answers, he actually recommended the less expensive unit. He even called the manufacturers to make sure it had the software to schedule automatic shutdowns, which it does. Easy to set up and use. If it stops functioning, I can always use it as a boat anchor. Built like a brick**** house. I am impressed. And no, I do not work for Best Buy.

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

    Rated 5 out of 5 stars

    Effective Battery Backup

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

    This battery has been working great at keeping my electronics running smoothly through brown-outs, power blips, and complete losses of power. The beep it makes is certainly loud, but can be muted for use in a bedroom or office.

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

    Works as advertised

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

    Bought two of these as I'm installing two individual PC's and need to have them both be able to automatically shut down with the enclosed software. I have used these before and not had any issues with them and don't expect any with these. Just make sure you plug the devices you want to have battery back-up into the appropriate receptacles and those just needing surge protection into the ones marked for that.

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

    Rated 5 out of 5 stars

    GREAT PRODUCT

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

    i purchased this based on a friend who has the same brand. i absolutely love it; right now im using it as a backup for my PS4; TV; CABLE MODEM; ROUTER; SWITCH and PS3. i needed something mainly for surges and this device is awesome; i only have the necessities plugged in such as the router modem ps4 in case of a power outage. i would recommend this to anyone; instructions were easy to follow.

    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.

    We bought this to run our Security system and wifi/cable when the power is off. The power has gone off a few time and it worked great was able to use the wifi on my ipad . This one does not Beep as soon as the power goes off like the small ones do it did start beeping letting us know the back up was low but not until it had been power or system for a while

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

    Rated 5 out of 5 stars

    Great protection.

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

    Offers great protection for your computer at an affordable price.

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

    Rated 5 out of 5 stars

    CyberPower - 850VA Battery Back-Up System - Black

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

    I have my TV attached to the device. In the last 2 weeks I have had 8 brown outs and 2 totally dead outages. This back up system keeps the TV safe and continues to run during all the outages. For the 2 dead outages I had to actually shut the TV down because I had no idea how long the power would be. But I did that not the outage which would hurt the TV. So the TV still works perfectly.

    I would recommend this to a friend