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HKM-821331 High-Capacity Portable Energy Storage Power Supply with Multiple Output Ports
Introducing the HKM-821331 High-Capacity Portable Energy Storage Power Supply, your reliable companion for all your power needs, both indoors and outdoors. With an impressive capacity of 330Wh and 90000mAh, this energy storage solution is designed to keep your devices running smoothly, no matter where you are.
Equipped with multiple output ports, including 1 AC socket, 1 12V vehicle charging socket, 2 Type-C interfaces, and 4 USB sockets, this versatile power supply can simultaneously power a variety of devices. Whether you need to charge your laptop, LCD TV, outdoor lights, desktop computer, mobile phone, or other household electronics, the HKM-821331 has got you covered.
Constructed from high-grade plastic with a waterproof shell, this energy storage power supply not only feels durable but also stands up to the rigors of outdoor use. The innovative design incorporates a lithium battery composed of 20 high-quality 21700 cells, ensuring reliability and a long lifespan.
With a fast charging capability, the HKM-821331 can be recharged in just 6-8 hours via the DC input. Plus, for long-term outdoor adventures, you can connect one or more solar charging panels with a power output of 40W to harness the sun’s energy.
Safety is a top priority with this product. It features advanced protection mechanisms including input overcurrent protection, overcharge protection, short circuit protection, and reverse connection protection, providing you with peace of mind during use.
If you’re looking for a powerful and functional energy storage solution, the HKM-821331 Portable Energy Storage Power Supply is your perfect choice. Its compact size of 280*195*95mm makes it easy to transport, while offering the power you need for your essential devices. Experience convenience and reliability in energy storage with this high-capacity power supply today.
Product description:
This product is an integrated energy storage power supply with a capacity of 330WH/90000mA. It is equipped with 1 AC socket+1 12V vehicle charging socket+2 Type-C interfaces+4 USB sockets+2 DC input ports, which can supply power to multiple devices at the same time, with powerful functions. This system has excellent compatibility and can be used for charging notebook, LCD TV, outdoor light, desktop computer, mobile phone and other household electronic products. The energy storage power supply is made of high-grade plastic waterproof shell, which has a very good feel. It is a very powerful outdoor product!
Product information:
Mechanical structure: energy storage power supply
Storage medium: lithium battery
Battery specification: 21700 cell
Number of batteries: 20
Input voltage/current: 16.8V/10A
Output voltage: 220V
Charging time: more than 6-8 hours (DC input)
Power: 330Wh or above
Applicable models: notebook, LCD TV, desktop computer, stereo, car refrigerator, mobile phone, digital, and other products with power below 300W
Size:280*195*95mm
Features:
High-power and high-speed power supply: It has a 12V vehicle charging socket, an AC socket and four USB ports, and supplies power for one electric device and four mobile phones.
High-capacity battery: a single battery module with a capacity of 90000mah (330Wh) is equal to the power of 50 mobile phones.
Fast charging: This product is an integrated energy storage power supply, which can be plugged in and used at any time. You can also choose one or more solar charging panels with a single panel power of 40W for long-term outdoor use.
Safety and high quality: the circuit of this product has the design of input overcurrent protection, overcharge protection, short circuit protection and reverse connection protection, which improves the perfect safety guarantee for daily use.
High-quality battery cell: This product uses lithium battery from a first-class manufacturer as the battery cell, with stable performance and low heat output. There is no obvious change in performance within 300 times of charging and discharging.
High-grade and beautiful: This product is made of ABS industrial plastic, fashionable and atmospheric, with exquisite, smooth and comfortable feel.
Packing list:
1* Emergency power supply
Every product we offer includes a 180-day purchase protection plan at no additional cost. This coverage extends beyond a standard warranty, reflecting our confidence in product quality and our ongoing commitment to your satisfaction.
The protection plan is designed to provide practical help in real-world situations. Whether you encounter a manufacturing issue, a performance problem, or an unexpected accident, our team is ready to assist with clear, fair solutions.
What Is Covered
Manufacturing Defects
We replace items with material or workmanship flaws at no charge.
Performance Failures
Free repair or replacement if the product fails under normal use.
Accidental Damage
One-time courtesy replacement at a reduced price.
Zero Hidden Fees
All shipping costs for replacements and returns are covered.
How to File a Claim
How This Differs from the Warranty
The 180-day purchase protection includes accidental damage and performance failures that are typically not covered by a standard warranty. It provides an additional layer of support during the first six months after purchase, giving you greater confidence and peace of mind.
We want you to be completely satisfied with your purchase. If for any reason you are not fully happy, you may return your item within 30 days of delivery for a full refund. No lengthy forms, no unnecessary questions.
Our return policy is built on a simple principle: if the product is not right for you, we will make it right. We understand that online shopping involves trust, and we work hard to earn that trust with every order.
Return Eligibility
30-Day Window
Request a return within 30 days of delivery.
Original Condition
Unworn or unused, with tags and original packaging.
Proof of Purchase
A receipt or order number is required.
Fast Refund
Refund processed within 10 business days.
How to Start a Return
Returns & Exchanges Overview
Damages & Exchanges
Please inspect your order as soon as it arrives. If the item is defective, damaged, or incorrect, contact us immediately so we can evaluate the issue and make it right. For exchanges, the fastest option is to return the original item and place a new order for the replacement.
We believe in the quality of our products, and we want you to share that confidence. Every product is backed by a 24-month warranty covering all structural and functional components, including zippers, buckles, straps, and fabric integrity.
The warranty is designed to be simple and accessible. You only need your proof of purchase to begin a claim, and our team will assess the issue promptly. If a manufacturing issue arises, we will make it right.
What the Warranty Covers
Comprehensive Coverage
Every part warranted for two full years.
Free Repair or Replacement
Whichever is faster, at no cost to you.
Quick Turnaround
Claims assessed within 1 business day.
Transferable
Warranty follows the product, not the owner.
How to File a Warranty Claim
Every order ships free—no minimums, no hidden fees. We currently deliver across the United States and are actively working to expand to more countries. We partner with reliable U.S. courier services to ensure your order arrives safely and on time.
Our delivery process is designed for transparency. From the moment you place your order to the moment it reaches your door, you receive clear updates at every stage. We carefully inspect each product before dispatch, and we provide tracking information as soon as your order ships.
Our U.S. Shipping Partners
USPS
Official national carrier with nationwide coverage.
UPS
Fast and reliable ground and express shipping.
FedEx
Express delivery with real-time tracking.
DHL eCommerce
Efficient parcel delivery for e-commerce shipments.
Delivery Process
Delivery Time Summary
Cancellations & Taxes
You may cancel your order at any time before it ships. All product prices include applicable taxes, and there are no additional VAT or customs fees for orders delivered within the United States.
Whether you have a question, need help with an order, or just want some advice, our support team is available around the clock. We don't just respond to messages—we work with you to find real solutions that fit your needs.
Our support specialists are trained to handle a wide range of requests, from product recommendations to technical troubleshooting. No matter the question, you can expect a professional and friendly response.
How We Can Help
Product Guidance
Our experts help you choose the right product.
Order Assistance
Modify orders, track shipments, or speed up delivery.
Warranty & Returns
Start claims or returns quickly and easily.
Technical Troubleshooting
Step-by-step solutions for product issues.
Contact Information
24/7 Phone
+1 (209) 280-3200
support@hekomart.com
Address
3401 Dale Rd, Modesto, CA 95356
Support Hours
Available 24 hours a day, 7 days a week
