---
product_id: 41162454
title: "Back-UPS Pro 850VA UPS, 510W Battery Backup & Surge Protector, AVR, 8 Outlets (NEMA 5-15R), LCD Display, BX850M Uninterruptible Power Supply for Computers, Wi-Fi Routers, Home Office Electronics"
brand: "apc"
price: "₨152877"
currency: LKR
in_stock: true
reviews_count: 10
category: "Apc"
url: https://www.desertcart.lk/products/41162454-back-ups-pro-850va-ups-510w-battery-backup-and-surge
store_origin: LK
region: Sri Lanka
---

# 850VA / 510W power capacity 8 total outlets (4 battery backup + 4 surge only) Automatic Voltage Regulation (AVR) for stable power Back-UPS Pro 850VA UPS, 510W Battery Backup & Surge Protector, AVR, 8 Outlets (NEMA 5-15R), LCD Display, BX850M Uninterruptible Power Supply for Computers, Wi-Fi Routers, Home Office Electronics

**Brand:** apc
**Price:** ₨152877
**Availability:** ✅ In Stock

## Summary

> 🔋 Stay powered, stay productive — never miss a beat with APC Back-UPS Pro 850VA!

## Quick Answers

- **What is this?** Back-UPS Pro 850VA UPS, 510W Battery Backup & Surge Protector, AVR, 8 Outlets (NEMA 5-15R), LCD Display, BX850M Uninterruptible Power Supply for Computers, Wi-Fi Routers, Home Office Electronics by apc
- **How much does it cost?** ₨152877 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/41162454-back-ups-pro-850va-ups-510w-battery-backup-and-surge)

## 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

- • **Reliable Power Backup:** 850VA / 510W capacity ensures your devices stay online during outages and brownouts.
- • **Smart Outlet Management:** 4 battery-backed outlets plus 4 surge-only outlets protect and prioritize your essential gear.
- • **User-Friendly Maintenance:** Easily replaceable battery (RBC17) prolongs UPS lifespan, keeping you protected long-term.
- • **Advanced Voltage Regulation:** AVR instantly corrects voltage fluctuations without draining your battery, extending runtime.
- • **Seamless Device Integration:** PowerChute UPS management software offers automated safe shutdown and real-time monitoring on Windows.

## Overview

The APC Back-UPS Pro 850VA (BX850M) is a robust uninterruptible power supply delivering 850VA/510W backup power with 8 outlets—4 with battery backup and surge protection, 4 surge-only. Featuring Automatic Voltage Regulation (AVR) to stabilize voltage fluctuations without battery drain, it supports seamless Windows integration via PowerChute software for safe shutdowns. Its user-replaceable battery extends device longevity, making it an essential safeguard for home and office electronics against outages and power surges.

## 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: Great product; poor packing. - First, let me rate the product. I have three of these UPS units in my house now. This series of UPS delivers output power that has a much better approximation to a true sine wave compared to many UPS units without having to spend $400. As a result, the newer PC power supplies are much happier and thus quieter and there is money left in my wallet. The battery is easy to install and change, the display is informative, and you have the option to turn off the visual display when the unit is running. The unit itself is also very quiet. There is an option to connect the UPS to a USB port on a Windows PC (don't know about Mac) with the included cable and Windows 7 or later will recognize the UPS. You can then program your PC to automatically shut down safely when the UPS is drained to a specified level. I haven't had to use that feature because we have occasional brownouts and very brief outages, but very rarely long-term power outages. In short, great product. I have three and will buy more as I need them. Second, let me rate desertcart's shipping department. Simply stated they did a poor job. The last UPS I received was in a box with very little packing material. When I took the UPS out of the box, the case was broken well beyond repair and there were bits of plastic in box that had broken off. I didn't dare even to test the thing. Surely UPS must have been too rough in handling, but there wasn't any real packing material either. The UPS didn't stand a chance. I contacted desertcart and their customer service folks got me fixed up with a replacement, but it was a hassle I wish I could have avoided. The replacement arrived OK along with more packing. How lucky do you think you are? I really like the UPS and wish I could buy it retail. I have my doubts about buying heavy and fragile items from desertcart.
Review: As advertised - Always a fan of APC brand UPS Backup, pretty reliable. I have two other but this is the first one this size. The screen is a nice ti=ouch, lets you know power usage.

## Features

- 850VA / 510W battery backup power supply
- 8 Outlets (NEMA 5-15R): 4 surge protector with battery backup; 4 outlets with Surge Protection Only
- 1 GB network dataline protection, 6' Power Cord, right-angle 3-prong wall plug (NEMA 5-15P). Powerchute UPS management via dedicated data port (Windows 10, 22H2 Pro, 11 Pro. For Mac OS, use native "Energy Saver" Settings)
- Automatic Voltage Regulation (AVR): instantly corrects low/high voltage fluctuations without discharging the battery, and is Active PFC compatible
- Replaceable Battery. Easily replace the back up battery with a genuine APC replacement battery, model RBC17 (sold separately)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B06WP9Q8ZN |
| Batteries | 1 Product Specific batteries required. (included) |
| Best Sellers Rank | #18 in Computer Uninterruptible Power Supply Units |
| Customer Reviews | 4.5 4.5 out of 5 stars (4,996) |
| Date First Available | February 27, 2017 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 14.99 pounds |
| Item model number | BX850M |
| Manufacturer | APC |
| National Stock Number | 0 |
| Product Dimensions | 12.2 x 3.58 x 7.48 inches |

## 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

![Back-UPS Pro 850VA UPS, 510W Battery Backup & Surge Protector, AVR, 8 Outlets (NEMA 5-15R), LCD Display, BX850M Uninterruptible Power Supply for Computers, Wi-Fi Routers, Home Office Electronics - Image 1](https://m.media-amazon.com/images/I/61hdc81zZ1L.jpg)

## Questions & Answers

**Q: Can you adjust the alarm settings?**
A: Yes, in the PowerChute software. A UPS that is connected to computers via the supplied USB cable can have their sensitivity settings adjusted, as well as specify what hours you want to disable the alarm, if desired.

**Q: How do you turn off the alarm?**
A: Back-UPS Pro has a button on the front that can mute any audible alarm caused by an event.

**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. The LCD screen on a Back-UPS Pro model will display the estimated runtime based on the current power load of products plugged into the UPS.

**Q: Is PowerChute software required to use this UPS? Will load-time and other data be visible on LCD without this software?**
A: Back-UPS Pro can be used without PowerChute software, and the LCD screen will display the full array of info offered. PowerChute provides additional settings and data, including energy usage/cost rate, CO2 emissions rate, and history of power events.

**Q: Does this allow for monitoring of the UPS over a network?**
A: You can monitor the status of the UPS via the PowerChute software when the USB data cable is attached. However, you cannot monitor remotely over a network. Please consider APC's Smart-UPS with SmartConnect (i.e. SMT1500C) for remote monitoring.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great product; poor packing.
*by B***5 on October 8, 2015*

First, let me rate the product. I have three of these UPS units in my house now. This series of UPS delivers output power that has a much better approximation to a true sine wave compared to many UPS units without having to spend $400. As a result, the newer PC power supplies are much happier and thus quieter and there is money left in my wallet. The battery is easy to install and change, the display is informative, and you have the option to turn off the visual display when the unit is running. The unit itself is also very quiet. There is an option to connect the UPS to a USB port on a Windows PC (don't know about Mac) with the included cable and Windows 7 or later will recognize the UPS. You can then program your PC to automatically shut down safely when the UPS is drained to a specified level. I haven't had to use that feature because we have occasional brownouts and very brief outages, but very rarely long-term power outages. In short, great product. I have three and will buy more as I need them. Second, let me rate Amazon's shipping department. Simply stated they did a poor job. The last UPS I received was in a box with very little packing material. When I took the UPS out of the box, the case was broken well beyond repair and there were bits of plastic in box that had broken off. I didn't dare even to test the thing. Surely UPS must have been too rough in handling, but there wasn't any real packing material either. The UPS didn't stand a chance. I contacted Amazon and their customer service folks got me fixed up with a replacement, but it was a hassle I wish I could have avoided. The replacement arrived OK along with more packing. How lucky do you think you are? I really like the UPS and wish I could buy it retail. I have my doubts about buying heavy and fragile items from Amazon.

### ⭐⭐⭐⭐⭐ As advertised
*by N***K on December 28, 2025*

Always a fan of APC brand UPS Backup, pretty reliable. I have two other but this is the first one this size. The screen is a nice ti=ouch, lets you know power usage.

### ⭐⭐⭐⭐⭐ Great ups for computers
*by R***Y on July 31, 2023*

I've used this ups for around 2 1/2 - 3 years and once I moved cross state I had to leave it behind due to the weight of it and being not as cost effective to ship across the us and ended up purchasing another one since it worked amazingly compared to the other ups's I've tried, gives you a buffer period between power flickers to not have your desktop pc completely shut off or a 5-15 minute window depending on your pc specs to power everything off safely in a full outage, I have a fairly beefy power hungry pc with a rtx 3080 and other high end parts and this is one of the few I've seen that can handle the wattage usage of my pc at this price point while still managing to keep my pc on during power flickers, also nice it has a side that's purely for surge protection and Ethernet surge protection, It's super important to have a solid Ethernet surge protector on your modem, had my previous 300$ 5 gigabit modem die to lightning hitting a tree in our front yard and having lightning travel up the copper coax line and frying it so make sure you're getting usage out of all of the features of this ups and save yourself money down the line with dead/fried components!

## 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 Sri Lanka*
*Store origin: LK*
*Last updated: 2026-03-14*