SKU: 30691823754

HKM-821331 High-Capacity Portable Energy Storage Power Supply with Multiple Output Ports

$162.00 $180.00
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Description

HKM-821331 High-Capacity Portable Energy Storage Power Supply with Multiple Output PortsIntroducing 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

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


Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 30691823754

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4.6 ★★★★★
Based on 29 reviews
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Verified Purchase
Danielle Chen
Cuba, US
★★★★★ 5
Perfect Balance of Comfort, Support, and Style!
Size: 934-Z, Color: Black, Size: 934-Z, Color: Black
I’ve been using this chair for a few weeks now, and I’m genuinely impressed with how much of a difference it’s made in my workspace. The mesh back is one of my favorite features—it offers excellent breathability and prevents that sticky, overheated feeling you sometimes get with solid-back chairs, even after sitting for hours. The seat cushion is firm enough to give proper support but still has enough give to keep me comfortable through long workdays. It feels like the perfect middle ground between soft and supportive. The adjustable foot ring has been a complete game changer for me. I use a taller desk setup, and having somewhere to rest my feet makes a huge difference in posture and overall comfort. Whether I’m sitting upright for focused work or leaning back to read, it’s always at the right height. The flip-up armrests are another smart design choice. When I’m typing, I like to have them down for support, but when I’m done, I can flip them up and push the chair neatly under my desk—saving space and keeping things tidy. The casters roll smoothly on both hardwood and rugs, so I can move around easily without scraping the floor or getting stuck. The overall build quality feels solid and sturdy, with no wobbles or creaks. Assembly was surprisingly quick—everything was clearly labeled, the parts felt durable, and it only took me about 20 minutes from opening the box to sitting in the chair. The sleek, modern look is another big plus—it blends in perfectly with my home office décor without feeling bulky or taking up too much visual space. If you’re looking for a chair that combines comfort, ergonomic support, durability, and style, I can’t recommend this one enough. It’s equally great for work, studying, or just relaxing at your desk, and it’s definitely been worth every penny.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 12, 2025
S
Verified Purchase
sleepywan
Lexington, US
★★★★★ 3
OK for the price, but overall comfort is avergae
Size: 934-Z, Color: Mustard
Easy to put together, color (mustard) accurate to images, and while I understand this is not a high-end chair, I feel like it still needs to be rated for its quality. Pros: the seat cushions are fairly comfortable and it rolls well. Adjustable footrest is easy enough and mostly sturdy. Cons: For a tall office chair, it doesn't go up high enough. I actually had to lower my standing desk to sit at it, which then isn't where I want it when I'm standing now. It's also a bit wobbly. The seat area's attachment to the post isn't as solid as it should be for a tall chair, so while sitting, it does tend to lean/slope forward and wobble side to side. The lumbar support is not adjustable, so I'm not even really sure what it does. And the armrests are not very comfortable to use. Since they are hard plastic, they are just a bit too rigid to rely on for any comfort. They are basically there to hold on to when you're getting out of the chair.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026
M
Verified Purchase
Mel
Cuba, US
★★★★★ 4
Good Value for a Tall Chair
Size: 934W-Z, Color: White
I have received this chair just today and would like to give my first impressions of it. Height is super adjustable as well as the foot rest. My desk is very tall (~34 inches vs standard ~29 inches) and does not suit a standard height chair. This chair's height is enough to sit comfortably at mybut also still having adjustment to be even higher. Lumbar support is a manual adjustment that can be adjusted by sliding the lumbar piece up or down and it seems it can be tiled as well. No reclining feature or slight backrest tilt adjustment. I'm used to my chairs reclining so it feels a little awkward siting in a flat base and straight backrest. I feel like I'm sitting too forward or leaning forward slightly but is probably something I can get use to. Easy to put together and feels very sturdy. Plastic parts of chair are made from a really sturdy plastic, like playhouse plastic materials. Wheels roll around carpet easily. Mesh seems to be a strong material, though the mesh feels kind itchy on bare skin. Overall, I think this is a good chair to get if you're needing a tall chair for a good value and can sacrifice no backrest tilt.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 3, 2025
T
Verified Purchase
Tram
Massapequa, US
★★★★★ 5
Excellent value for money!
Size: 934W-Z, Color: Black, Size: 934W-Z, Color: Black
I absolutely love this office chair! I needed a chair that could support my standing desk without sacrificing comfort, and this one completely exceeded my expectations. It's incredibly sturdy and durable, well-made, and the height adjustment is super convenient, making it easy to find the perfect fit. Even during long hours of work, the seat is comfortable, and the ergonomic design effectively reduces pressure on my back and legs. I love its clean, modern look—it fits my home office perfectly. Assembly was quick and easy, and for this price, the quality is absolutely fantastic!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 24, 2026
L
Verified Purchase
Lisa Bjornstad
San Leandro, US
★★★★★ 5
Perfect chair!
Size: 934-Z, Color: Blue, Size: 934-Z, Color: Blue
I have an adjustable-height desk (also purchased from Amazon) and needed a drafting chair for those times when my body gets tired of standing. This chair fits the bill and then some! I put it together myself; it took me about an hour, but would take me about half that next time, since now I know what to do (and what NOT to do!). All the parts were there; there are even spare parts (see photo). All the holes were drilled in exactly the right places, too, which isn't always the case when I buy things from Amazon (my standing desk is a great example). The chair fits me; I'm short (5'3.5"), and often the seats of furniture are too deep for me to rest my feet flat on the floor. The depth of the seat on this chair is just a little over 18 inches, and with the adjustable footrest ring, it's perfect. I don't think a tall or heavy person would fit in it, to be honest. But it's perfect for those of us who are vertically challenged. I love that it glides easily on my hardwood floors and that it turns 360 degrees. The chair comes in numerous luscious colors, so take your pick! It is very sturdy, has good lumbar support, and the seat and seat back are very comfortable. And the arms flip up, which was an absolute must when I was shopping for this chair. I got it on sale, too -- $109.00 -- and I'm delighted with this purchase.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 23, 2026

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