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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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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 24 Showing 461-480 of 1,023 reviews
  • Pros mentioned:
    Battery life

    Rated 5 out of 5 stars

    As advertised

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

    Tested several times after fully charged. Hooked up in a small network closet and maintained power until generator kicked in. Great product.

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

    Rated 5 out of 5 stars

    great for power outages

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

    I love this thing because I have power outages a lot and this gives me the time to turn my computer off instead of it just shutting all at once.

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

    Rated 5 out of 5 stars

    Solid Battery Back-Up System

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

    This UPS seems to be exactly what was advertised. Very happy so far but have not yet encountered an emergency to test the actual battery life.

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

    Keeps my IT stuff safe

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

    Seems great but have not had the opportunity to see whether it protects against surged

    No, I would not recommend this to a friend
  • Pros mentioned:
    Price

    Rated 5 out of 5 stars

    Good Price

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

    This brand seems to perform fine with a better price than APC. I can't attest to the longevity of the batteries yet but so far so good.

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

    Mid-range option

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

    Perfect for when you need a UPS bigger and with more plugs than the 40-60 dollar range, but don't need the server-grade 200 dollar models.

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

    Replaced the old UPS just fine

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

    Seems to work fine. No problems so far. But I thought the clear dark plastic front would have a live status display like the bigger models, but no. That's OK because this is not protecting a very important machine. With a display, I'd give it 5 stars.

    No, I would not recommend this to a friend
  • Pros mentioned:
    Battery life

    Rated 5 out of 5 stars

    Excellent backup unit

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

    this unit has enoutgh capacity for most application in the home/office. Very resposive good product. Will buy another unit soon.

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

    Highly recommend for any PC computer

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

    never use the PC computer with out backup ups all you will in problem all the time.

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

    Flawless performance over the long haul

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

    This battery back-up system does everything we've asked it to, and never quit. Worth it's weight in gold!

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

    Good

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

    The name has a good history to being consistent with its availability

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

    Rated 5 out of 5 stars

    Great battery

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

    Great battery. The lights went off for a couple of minutes, the computer stay on so I can saved my work and could properly shut down.

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

    Rated 5 out of 5 stars

    Good quality

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

    Has never given me any issues, has kept my ps4 from burning because of electricity

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

    Rated 5 out of 5 stars

    Very good replacement for battery backup!

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

    The battery backup system replaced an older battery backup which had failed. Very happy with the new one I purchased!

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

    Works great for fish tanks!

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

    I use it for my 55 gallon salt water tank just in case the lights go out again.

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

    Good prod.

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

    Good product served the need for my computers well would buy again

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

    Rated 5 out of 5 stars

    Perfect backup

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

    This was a replacement, my last one lasted 11 years. This company makes a great product and Best Buy had the best price.

    I would recommend this to a friend
  • 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.

    Bought it to help out someone whose old UPS had fried. This one was easy to set up with power down software and no problems so far.

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

    Rated 5 out of 5 stars

    Basic Backup

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

    This device is adequate for basic backup to give you time (or your software) to turn off equipment before crashing from power loss.

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

    Easy to set up

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

    Bought this unit to replace old UPS with bad battery. This new battery back-up cost less than replacement battery with shipping. Easy set up and has more receptacles than old one. Nice unit

    I would recommend this to a friend