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APC Battery Back-UPS Pro BX850M

BH #APBX850M • MFR #BX850M
83 reviews
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APC Battery Back-UPS Pro BX850M
Key Features
  • Output: 850 VA / 510W
  • Input: 120 VAC @ 60 Hz ± 3 Hz
  • 8 x Total NEMA5-15R Outlets
  • 4 x Battery Backup & Surge Outlets
Designed for electronics in your home or office, such as computers and related equipment, network devices (modem/router), POS devices, CCTV circuits, televisions, video game consoles, and more, the Battery Back-UPS Pro BX850M from APC helps protect against surges, spikes, lightning, and outages. In the case of a power outage, it can provide up to 2 minutes of runtime at max load, 8.9 minutes at half load, and 167 minutes at 10W. It also provides an output capacity of 850 VA / 510W, eight total NEMA5-15R outlets (four battery backup & surge and four surge-only), an input voltage of 120 VAC at 60 Hz ± 3 Hz using its 6' cord with a NEMA5-15 plug, a surge energy rating of 1103 joules, and 1Gb of dataline protection. Its sealed, lead-acid battery is maintenance-free and can be replaced using an RBC17 replacement battery. The BX850M outputs 98 to 139 VAC at 60 Hz ± 1 Hz (on utility) and 115 VAC ± 8% at 60 Hz ± 1 Hz (on battery).
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APC BX850M Overview

Designed for electronics in your home or office, such as computers and related equipment, network devices (modem/router), POS devices, CCTV circuits, televisions, video game consoles, and more, the Battery Back-UPS Pro BX850M from APC helps protect against surges, spikes, lightning, and outages. In the case of a power outage, it can provide up to 2 minutes of runtime at max load, 8.9 minutes at half load, and 167 minutes at 10W. It also provides an output capacity of 850 VA / 510W, eight total NEMA5-15R outlets (four battery backup & surge and four surge-only), an input voltage of 120 VAC at 60 Hz ± 3 Hz using its 6' cord with a NEMA5-15 plug, a surge energy rating of 1103 joules, and 1Gb of dataline protection. Its sealed, lead-acid battery is maintenance-free and can be replaced using an RBC17 replacement battery. The BX850M outputs 98 to 139 VAC at 60 Hz ± 1 Hz (on utility) and 115 VAC ± 8% at 60 Hz ± 1 Hz (on battery).

For areas with inconsistent power grids, Automatic Voltage Regulation (AVR) helps provide stability against voltage fluctuations, overvoltages, and brownouts. This UPS has an integrated LCD display that shows information on the utility and system status, and PowerChute Personal Edition software can help track power quality, configure alarms, and shut down your computer during an outage.

When compared to the previous generation of APC's Back-UPS systems, this model features a more compact design with a smaller footprint, surge protection improvements, and improved 1Gb dataline protection. Also featured is a limited lifetime data-recovery warranty and a limited 3-year warranty for the APC unit.

General Features
Product Improvements
  • Smaller Footprint
  • Improved Dataline Protection (1Gb)
  • Surge Protection Improvements
    • LCD (Liquid Crystal Display)
    Provides information about the utility and UPS conditions:
  • Input Power (On Battery/On Utility)
  • Input Voltage
  • Output Voltage
  • Output Frequency
  • Load (Watts, % of Capacity, Graphic Display)
  • Overload
  • AVR Working
  • System Fault
  • Replace Battery
  • Battery Charge Status (Graphic Display)
  • Estimated Runtime
  • Power Saving Mode (Enabled/Disabled)
  • Mute (Enabled/Disabled) Number of Power Events
    • 1Gb Network Dataline Protection
    Hot-Swappable Batteries: Help ensure clean and uninterrupted power to protect equipment while batteries are being replaced.

    User-Replaceable Batteries: Increase availability by allowing a trained user to perform upgrades and replacements of the batteries, reducing the time needed for repairs.

    Battery Backup & Surge-Protected Outlets: Keep devices running when the power goes out or fluctuates beyond safe levels.

    Surge-Only Outlets: Protect electronics without reducing battery capacity.

    Push-Button Circuit Breaker: Allow quick recovery from overloads and eliminate the need for fuse replacement.

    APFC Power Cord Compatibility: Compatible with personal computers that have an Active-PFC power supply.

    USB Communication Port: For the management of shutdowns via PowerChute Personal Edition.
    PowerChute Personal Edition
    PowerChute software provides additional power protection and management features for Back-UPS Pro users, safeguarding files and programs.
  • Readout of the current power conditions
  • Displays daily energy consumption and cost of powering your equipment
  • Saves money by allowing you to choose an energy management plan that fits your needs
  • Prevents data corruption by saving files and shutting down your system during extended power outages or low battery conditions
  • Monitors the system and logs utility power problems and battery conditions
  • Allows you to configure Back-UPS options like voltage transfer settings, silence alarms during night hours, shutdown parameters, energy management features, and more
  • User-friendly installation takes the guesswork out of configuration for first-time users with a help feature (USB and serial interface)
    • Automatic Voltage Regulation (AVR)
    Corrects voltage fluctuations, saving your battery power for blackouts.
    Automatic Diagnostic Testing
    Helps ensure your unit is ready when needed.
    ENERGY STAR
    This label helps ensure that products are independently certified as energy efficient, which save money year after year.
    UPC: 731304331797

    APC BX850M Specs

    Key Specs
    Total Outlets
    8x NEMA 5-15R
    Surge Protection
    Yes: 1103 Joules
    Maximum Wattage
    510 W
    Full-Load Runtime
    2 Minutes
    General
    Total Outlets
    8x NEMA 5-15R
    Protected Outlets
    4x NEMA 5-15R (Battery and Surge)
    4x NEMA 5-15R (Surge Only)
    Coax Protection
    1-In
    1-Out
    Data Line Protection
    RJ45
    Communications I/O
    USB, Serial via RJ45
    Topology
    Line Interactive
    Transfer Time
    8 to 10 ms
    Power
    Surge Protection
    Yes: 1103 Joules
    Current
    12 A
    Maximum Wattage
    510 W
    Nominal Input Voltage
    120 VAC
    Input Frequency
    60 Hz ± 3 Hz
    Nominal Output Voltage
    120 VAC
    Output Voltage Range
    98 to 139 VAC
    Load Capacity
    850 VA
    Waveform
    Simulated Sine Wave
    Battery
    Chemistry
    Lead-Acid
    Full-Load Runtime
    2 Minutes
    Half-Load Runtime
    8.9 Minutes
    Recharge Time
    12 Hours
    Replacement Battery
    RBC17
    Physical
    Operating Conditions
    32 to 104°F / 0 to 40°C up to 95% Humidity
    Noise Level
    45 dBA
    Certifications
    CEC, ENERGY STAR, TUV
    Cable Length
    6' / 1.8 m
    Rackmount Size
    No
    Dimensions (W x H x D)
    7.5 x 3.6 x 12.2" / 190 x 91 x 310 mm
    Weight
    15 lb / 6.8 kg
    Packaging Info
    Package Weight
    16.235 lb
    Box Dimensions (LxWxH)
    17.2 x 9.9 x 5.6"

    APC BX850M Reviews

    Does the trick!

    By jennah121_512
    Rated 5 out of 5
    Date: 2025-10-12

    [This review was collected as part of a promotion.] I received this product in exchange for my honest review. Coincidentally, just a couple of weeks after receiving the product, we had a small power outage in my family home. I had already begun to utilize this and it seemed to work exactly as described. I was able to keep my computer running with no interference or issues caused by a power surge. Great to have in order to protect our precious devices!

    Perfect for FL hurricane season

    By teresaw76_3423
    Rated 5 out of 5
    Date: 2025-09-30

    [This review was collected as part of a promotion.] This back-UPS box is a great piece of equipment to have, especially during hurricane season in Florida. I work from home and there's tons of power outages lasting for a variety of time frames. This box will ensure a steady stream of power to my computer so I don't have to miss any time off. With the computer set up I have, I should get around 30 minutes of power. I did test this box on my laptop and my TV for about 10 minutes and they powered perfectly. I will probably get another one for my bedroom.

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