---
product_id: 41162454
title: "850VA/510W Pro UPS Battery Backup for Office Electronics, AVR, BX850M | 850VA Back-UPS Pro for home offices — 8 outlets, LCD, AVR, surge protection, 29-min runtime (@100W) for PCs & workstations"
brand: "apc"
price: "$513.76"
currency: USD
in_stock: true
reviews_count: 13
category: "Apc"
url: https://www.desertcart.us/products/41162454-850va-510w-pro-ups-battery-backup-for-office-electronics-avr
store_origin: US
region: United States of America
---

# 850VA / 510W power backup 6+ min runtime @ 300W load 8 protected outlets + coax & Ethernet surge 850VA/510W Pro UPS Battery Backup for Office Electronics, AVR, BX850M | 850VA Back-UPS Pro for home offices — 8 outlets, LCD, AVR, surge protection, 29-min runtime (@100W) for PCs & workstations

**Brand:** apc
**Price:** $513.76
**Availability:** ✅ In Stock

## Summary

> 🔋 Stay powered, stay productive — never miss a beat!

## Quick Answers

- **What is this?** 850VA/510W Pro UPS Battery Backup for Office Electronics, AVR, BX850M | 850VA Back-UPS Pro for home offices — 8 outlets, LCD, AVR, surge protection, 29-min runtime (@100W) for PCs & workstations by apc
- **How much does it cost?** $513.76 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/41162454-850va-510w-pro-ups-battery-backup-for-office-electronics-avr)

## Best For

- apc enthusiasts

## Why This Product

- Trusted apc brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Smart Voltage Regulation:** Automatic Voltage Regulation (AVR) stabilizes voltage without draining battery, perfect for sensitive electronics.
- • **Sustainable & User-Friendly:** Energy Star certified with a replaceable battery for long-term, eco-conscious reliability.
- • **Reliable Power When It Counts:** 850VA / 510W capacity ensures your critical devices stay online during outages.
- • **Comprehensive Surge Protection:** 8 outlets with 4 battery-backed plus coaxial & Ethernet surge protection guard your entire setup.
- • **Extended Runtime for Peace of Mind:** Over 6 minutes of backup at 300W load lets you save work and safely power down.

## Overview

The APC Back-UPS Pro 850VA (BX850M) is a robust uninterruptible power supply delivering 850VA/510W backup power with 8 surge-protected outlets, including 4 battery-backed. Featuring Automatic Voltage Regulation (AVR), it stabilizes voltage fluctuations while providing over 6 minutes of runtime at 300W load. Designed for home office and professional setups, it supports critical electronics like computers, routers, and NAS devices. Energy Star certified and equipped with a user-replaceable battery, it offers reliable surge protection and a 3-year warranty with $75,000 connected equipment coverage.

## Description

This APC battery back up power supply offers guaranteed power and surge protection for wireless networks, computers, and other electronics in your home or business. Backup battery power supply is designed for use during outages and unsafe voltage fluctuations, and provides surge protector with battery backup in the event of damaging power surges and spikes. The APC Back-UPS PRO series of Uninterruptible Power Supply are the perfect battery backup for computer, external harddrive and routers to protect your data and keep you connected. This APC 850VA UPS offers AVR, is active PFC compatible, and has a User-replaceable battery to prolong the life of your UPS by APC.

Review: Works great- as advertised. APC is a quality UPS brand. - ACP Brand is always good. I have 4 in my home office (Work computer, Stable Diffusion dedicated computer, network infrastructure, and electronic music devices). Word of advice, these are not for sustained usage during an outage for a standard desktop. (Which should be obvious to people). Just keep your computer on it, and just one monitor, so if they power goes out, you can save your work and turn off the machine. Make sure non-essential items are on the non-battery-backup plugs. Works great for intermittent outages. Also, waking up in the middle of the nights to beep beep beep-- I don't have to check to see if the power is out-- (not complaining about the noise). It's calm enough to be informative yet alerting.
Review: Good product, disappointing (Supplier) support - This is my 2nd APC UPS backup. The first is over two years old and has performed flawlessly supporting a high-end workstation. I bought this 2nd, somewhat smaller model for my office PC. I was pleased with my purchase for six weeks until the first blackout intervention due to a thunderstorm. The UPS did not survive, when the power was restored the device insisted there was a short on the output, which of course there wasn't. The total load on the output is less than 30% of the rating, but even with the load removed it still alarmed. This began a three week adventure: - desertcart does not allow a defective return-replacement (because of the batteries I assume). Beware. - APC has a 3 year warranty but their support process is agonizing. I spent several hours in chat-windows answering inane questions like 'Is it plugged in?' or 'Are you sure there is no short on the output?' At one point the agent (who was obviously multi-tasking) picked the wrong chat-window to type to another customer. That was interesting to sort out. - I finally found someone with a brain who started a swap-process. APC would send a replacement and I would return the defect. - The replacement arrived 10 days after the failure event. I installed it and everything was fine. I re-packaged the defect in the shipping box. But there was no information about where to send it. - Another week passed before I got an email with a pre-paid return label as a pdf attachment. I assume the original item was an infant-mortality so Five Stars for the product. Battery life is over 20 minutes with my load and the PowerChute software puts the system to sleep before the UPS runs dry. It's an imperfect world: screws fall out. Time will tell if this was an isolated event or a chronic problem, but up to now I am optimistic.

## Features

- 850VA / 510W RELIABLE BACKUP POWER: Delivers short‑term battery power to keep essential devices powered during blackouts, surges, and unexpected power interruptions
- STAY CONNECTED WHEN IT MATTERS MOST: Provides over 6 minutes of backup runtime at a 300W load—keeping computers, TVs, DVRs, Wi-Fi routers, modems, external drives, NAS systems, and smart home devices powered during outages
- EIGHT PROTECTED OUTLETS: Power your entire setup with 4 battery backup outlets for essential devices, plus 4 surge-only outlets for peripherals—plus built-in coaxial and Ethernet surge protection for added peace of mind
- AUTOMATIC VOLTAGE REGULATION (AVR): Corrects low voltage brownouts (88V+) and surges (+/-13%) without draining battery—boosts or trims to stable 120V. Extends runtime for blackouts; Active PFC compatible for gaming PCs
- REPLACEABLE BATTERY & ENERGY STAR UPS: User-replaceable battery (RBC17, sold separately) for zero-downtime swaps. ENERGY STAR certified for 92%+ efficiency, cutting energy costs vs standard UPS units
- ENHANCED PROTECTION FOR CONNECTED ELECTRONICS: Supported by a 3‑Year Warranty and $75,000 Equipment Protection, offering enhanced coverage for connected devices and added assurance against power‑related damage

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B06WP9Q8ZN |
| Amperage | 16.0 |
| Battery Cell Composition | Sealed Lead Acid |
| Battery Cell Type | Sealed Lead Acid |
| Battery Charge Time | 12 Hours |
| Best Sellers Rank | #19 in Computer Uninterruptible Power Supply Units |
| Brand | APC |
| Built-In Media | UPS^User Manual^USB Cable^Coaxial Cable |
| Color | Black |
| Connector Type | NEMA |
| Customer Reviews | 4.6 out of 5 stars 792 Reviews |
| Enclosure Material | Plastic |
| Form Factor | Tower |
| Global Trade Identification Number | 00731304331797 |
| Input Voltage | 120 Volts (AC) |
| Item Dimensions | 12.2 x 3.58 x 7.48 inches |
| Item Dimensions D x W x H | 17.3"D x 9.8"W x 5.7"H |
| Item Type Name | battery backup UPS |
| Item Weight | 14.99 Pounds |
| Manufacturer | APC |
| Material | Plastic |
| Maximum Power | 510 Watts |
| Mfr Part Number | BX850M |
| Model Number | BX850M |
| Number of Outlets | 8 |
| Output Current | 16 Amps |
| Output Voltage | 120 Volts (AC) |
| Output Wattage | 510 Watts |
| Power Plug Type | Type B - 3 pin (North American) |
| Product Dimensions | 17.3"D x 9.8"W x 5.7"H |
| Runtime | 6 minutes |
| Surge Protection Rating | 1103 Joules |
| UPC | 731304331797 |
| Unit Count | 1.0 Count |
| Voltage | 120 Volts |
| Warranty Description | 3 years |
| Wattage | 510 watts |

## Product Details

- **Battery Cell Composition:** Sealed Lead Acid
- **Brand:** APC
- **Color:** Black
- **Product Dimensions:** 17.3"D x 9.8"W x 5.7"H
- **Voltage:** 120 Volts

## Images

![850VA/510W Pro UPS Battery Backup for Office Electronics, AVR, BX850M | 850VA Back-UPS Pro for home offices — 8 outlets, LCD, AVR, surge protection, 29-min runtime (@100W) for PCs & workstations - Image 1](https://m.media-amazon.com/images/I/61hdc81zZ1L.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: How long will this UPS power my system when the power goes out?**
A: Runtimes of any UPS will vary based on the amount of power required by your connected devices.

**Q: Will the UPS automatically switch off from the battery backup when power is restored?**
A: Yes, when adequate power is restored to the UPS and is within the operating voltage range of the UPS, it will revert to passing utility power to connected electronics.

**Q: My UPS is on, but my power button is blinking and beeping.**
A: The battery needs to be connected first. Please read the user manual for instructions on connecting the battery.

**Q: Can I plug the UPS into an extension cord, or does it have to be plugged into a wall outlet?**
A: To get the best power available, your UPS should be plugged directly into the wall outlet. Plugging your UPS into a surge protector may cause the UPS to go to the battery often when it usually should remain offline.

**Q: Is this UPS battery user-replaceable?**
A: Yes, It is compatible with a dedicated user-replaceable battery, and the APC replacement battery cartridge helps restore UPS performance to the original specifications.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works great- as advertised. APC is a quality UPS brand.
*by O***3 on May 20, 2026*

ACP Brand is always good. I have 4 in my home office (Work computer, Stable Diffusion dedicated computer, network infrastructure, and electronic music devices). Word of advice, these are not for sustained usage during an outage for a standard desktop. (Which should be obvious to people). Just keep your computer on it, and just one monitor, so if they power goes out, you can save your work and turn off the machine. Make sure non-essential items are on the non-battery-backup plugs. Works great for intermittent outages. Also, waking up in the middle of the nights to beep beep beep-- I don't have to check to see if the power is out-- (not complaining about the noise). It's calm enough to be informative yet alerting.

### ⭐⭐⭐⭐⭐ Good product, disappointing (Supplier) support
*by M***L on August 1, 2019*

This is my 2nd APC UPS backup. The first is over two years old and has performed flawlessly supporting a high-end workstation. I bought this 2nd, somewhat smaller model for my office PC. I was pleased with my purchase for six weeks until the first blackout intervention due to a thunderstorm. The UPS did not survive, when the power was restored the device insisted there was a short on the output, which of course there wasn't. The total load on the output is less than 30% of the rating, but even with the load removed it still alarmed. This began a three week adventure: - Amazon does not allow a defective return-replacement (because of the batteries I assume). Beware. - APC has a 3 year warranty but their support process is agonizing. I spent several hours in chat-windows answering inane questions like 'Is it plugged in?' or 'Are you sure there is no short on the output?' At one point the agent (who was obviously multi-tasking) picked the wrong chat-window to type to another customer. That was interesting to sort out. - I finally found someone with a brain who started a swap-process. APC would send a replacement and I would return the defect. - The replacement arrived 10 days after the failure event. I installed it and everything was fine. I re-packaged the defect in the shipping box. But there was no information about where to send it. - Another week passed before I got an email with a pre-paid return label as a pdf attachment. I assume the original item was an infant-mortality so Five Stars for the product. Battery life is over 20 minutes with my load and the PowerChute software puts the system to sleep before the UPS runs dry. It's an imperfect world: screws fall out. Time will tell if this was an isolated event or a chronic problem, but up to now I am optimistic.

### ⭐⭐⭐⭐⭐ Tested Under (Lightning) Fire
*by G***S on March 18, 2026*

Lightning struck 3 houses down and fried our modem through the coax line, which also caused the ethernet-in port on our router to go dead. My computer, however, was protected with the APC Back-UPS Pro 850VA and was totally isolated (thank you wi-fi!) I could hear it click over into emergency power as soon as I saw the lighting flash, so I consider this to be tested under fire. The companion software is visually bare-bones but otherwise works great with Windows 11, the app runs quietly in the background and doesn't use much of anything, and is very programmable with the UPS. For mine, if the power is out for 60 seconds, my computer is sent a command to hibernate. Maybe less important, but I hear this protecting my computer from 'dirty power' at times as well. Outside of the regular testing interval, I hear the relays click on the rare occasion the lights slightly dim as well. Unit has been in service for 3.5 years and still performs wonderfully. I like how it's incredibly quiet (UPS of old would alarm annoyingly).

## Frequently Bought Together

- APC Battery Backup Surge Protector, BX850M Backup Battery Power Supply, AVR, Dataline Protection,12.2 x 3.58 x 7.48 inches (Black)
- APC UPS Replacement Battery RBC17 for APC Back-UPS Models BE650G1, BE750G, BR700G, BE850M2, BE850G2, BX850M, BE650G, BN600, BN700MC, BN900M, BVK950M2, BVN950M2 and select others
- APC UPS Battery Backup and Surge Protector, 600VA/330 Watts Backup Battery Power Supply, BE600M1 Back-UPS with USB Charger Port

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-07-12*