HKM-821331 High-Capacity Portable Energy Storage Power Supply with Multiple Output Ports
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 1935 reviews
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Product Reviews
A
Verified Purchase
Aimee C.
Alexandria, US
★★★★★ 4
Perfect size and weight with compact size
Style: Rack with 3 Pairs (3, 5, and 8 Pound)
I purchased the Amazon Basics Neoprene Dumbbell Hand Weights specifically for Pilates, and they’ve been a great addition to my routine. The size and weight are perfect for controlled movements, helping with muscle toning without feeling too bulky or awkward. The neoprene coating gives them a comfortable, non-slip grip, which is especially important during longer sessions or when your hands get a little sweaty. They feel secure and easy to hold through a full workout. I also like the shape—they don’t roll around on the floor, which makes transitions between exercises smoother and less frustrating. They’re compact enough to store easily but still feel durable and well-made. Overall, these are a simple, affordable, and effective option for Pilates or light strength training. I’d definitely recommend them for anyone looking to add a little resistance to their workouts without overcomplicating things.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 20, 2026
J
Verified Purchase
J. saroukhan
Carnegie, US
★★★★★ 5
Well made , gym quality
Style: 10 Pound, Pair
Color is nice and bright . The weights grips are good they do not slip . Prices reflect quality
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026
K
Verified Purchase
Kim Wood
Grantham, US
★★★★★ 5
Good purchase
Style: 3 Pound, Pair
These are just the right weight for me to start gaining muscle back in my arms, after a large weight loss. They are of good quality, they are covered in a nice rubber like coating that is soft to the touch. They are small enough that i can take them with me when I travel. My dog has got hold of them a couple times and played with them, and they held up just fine without any damage.
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Reviewed in the United States on April 28, 2026
K
Verified Purchase
Ky Mogg
Grantham, US
★★★★★ 5
Solid, grippy, and they don’t roll away!
Style: 10 Pound, Pair
I bought these because I’m finally trying to build a consistent home workout routine and didn't want to drop a fortune on name-brand weights. I’ve been using this 10lb pair for about a month now for everything from overhead presses to lunges, and honestly, they’re exactly what I was looking for. The Pros: • That Neoprene Grip: The coating is fantastic. Even when my hands get pretty sweaty halfway through a workout, I don’t feel like I’m going to drop them. It’s a much "softer" feel than cold metal or hard plastic. • The Hex Shape: This is a small detail that makes a huge difference. Since the ends are hexagonal, they don't roll across the floor when I set them down between sets. They also stay put if I’m using them for "renegade rows" or floor work. • Compact Size: They aren’t bulky. I can easily shove them under my bed or in the corner of the closet when I’m done. • No Weird Odor: I was worried they might smell like a tire factory (which happens with some rubber-coated weights), but these had almost no scent right out of the box. The Cons: • Handle Diameter: The handles are a little on the thicker side. I have medium-sized hands and it’s fine, but if you have very small hands, they might feel a bit chunky to wrap your fingers all the way around. • Color Scuffs: The navy blue looks great, but if you clank them together or drop them on concrete, the coating can scuff or show dust pretty easily. The Verdict: If you just need a reliable set of weights for HIIT, Pilates, or general strength training, these are a no-brainer. You're basically getting gym-quality equipment for a fraction of the price. I’ll probably be back for the 15lb set in a few months!
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Reviewed in the United States on January 27, 2026
M
Verified Purchase
Matt
Fort Morgan, US
★★★★★ 5
Simple, Comfortable, and Exactly What You Expect
Style: Rack with 3 Pairs (5, 10, and 15 Pound)
These are pretty much exactly what you want from a set of dumbbells — simple, functional, and no nonsense. The neoprene coating gives them a comfortable grip and keeps them from feeling slick in your hands, especially during longer workouts or if your hands get sweaty. The coating also helps keep them from banging up floors or making as much noise compared to bare metal weights, which is nice if you’re working out at home. Weight accuracy seems fine for general fitness use, and they’ve worked great for things like accessory movements, shoulder work, lighter presses, rehab-style exercises, and general muscle toning. The shape also helps keep them from rolling around everywhere when set down. They’re not fancy, and they’re not trying to be — they’re just dependable dumbbells that do what they’re supposed to do at a fair price. If you want straightforward hand weights for home workouts without overthinking it, these are a solid buy.
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Reviewed in the United States on May 26, 2026

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