How long will this UPS power my system when the power goes out?

Runtimes of any UPS will vary based on the amount of power required by your connected devices.

Will the UPS automatically switch off from the battery backup when power is restored?

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.

My UPS is on, but my power button is blinking and beeping.

The battery needs to be connected first. Please read the user manual for instructions on connecting the battery.

Can I plug the UPS into an extension cord, or does it have to be plugged into a wall outlet?

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.

Is this UPS battery user-replaceable?

Yes, It is compatible with a dedicated user-replaceable battery, and the APC replacement battery cartridge helps restore UPS performance to the original specifications.

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

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

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

Product ID: 41162454

Details

Battery Cell Composition
Sealed Lead
Brand
APC
Color
Black
Product Dimensions
17.3"D x 9.8"W
Voltage
120 Volts

⚡850VA / 510W power capacity

🔋6+ min runtime @ 300W load

🖥️8 outlets (4 battery + 4 surge)

Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.

11303800₫

Duties & taxes included

In stock

Sold byAmazon VietnamDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Vietnam.

Secure transaction

Details

Battery Cell Composition
Sealed Lead
Brand
APC
Color
Black

Description

🔌 Power up your productivity — never miss a beat!

PEACE OF MIND GUARANTEED - Backed by a 3-year warranty and $75,000 equipment protection for your valuable electronics.
STAY CONNECTED NO DOWNTIME - 6+ minutes of runtime at 300W load ensures your work and entertainment never pause.
RELIABLE POWER WHEN IT COUNTS - 850VA / 510W backup keeps your essential devices running through outages and surges.
SMART SURGE VOLTAGE DEFENSE - AVR stabilizes voltage fluctuations while coaxial & Ethernet surge protection shields your network.
CUSTOMIZABLE ENERGY EFFICIENT - User-replaceable battery and ENERGY STAR 92%+ efficiency save costs and extend UPS life.

The APC Back-UPS Pro 850VA is a robust uninterruptible power supply delivering 510W of reliable backup power with 8 protected outlets, including 4 battery-backed and 4 surge-only. Featuring Automatic Voltage Regulation (AVR), it stabilizes voltage dips and surges without draining the battery, providing over 6 minutes of runtime at moderate loads. Its user-replaceable battery and ENERGY STAR certification ensure long-term efficiency and cost savings. Designed for home office and professional setups, it includes coaxial and Ethernet surge protection, an LCD display, and is supported by a 3-year warranty plus $75,000 equipment coverage, making it a trusted safeguard for your critical electronics.

Specifications

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 791 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	15 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

Reviews

G**S

18.03.2026

M**L

1.08.2019

R**Y

23.12.2022

S**N

1.05.2024

W**T

1.03.2021

J**K

14.09.2025

R**A

19.11.2024

D**S

28.11.2025

A**R

31.07.2018

S**T

7.11.2023

R**S

22.11.2018

C**U

14.08.2023

B**T

20.07.2019

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.

11303800₫

Duties & taxes included

In stock

Sold byAmazon VietnamDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Vietnam.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Fatima A.

Best international shipping I've ever tried. Worth every penny!

3 days ago

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

View all Trustpilot reviews