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Customer Ratings & Reviews

Your price for this item is $49.99
The comparable value price is $59.99

Customer reviews

Rating 4 out of 5 stars with 298 reviews

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  • Value

    Rating 4.1 out of 5 stars

  • Quality

    Rating 4.1 out of 5 stars

  • Ease of Use

    Rating 4.2 out of 5 stars

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78%would recommend to a friend

Customers are saying

Customers are enthusiastic about the POWER 500 Watt Power Inverter with Fast Charge USB for its reliability, especially when used for laptops and while camping. However, they have concerns about the short cord length, insufficient power for some devices, occasional reports of it not working or emitting a burning smell, and its overall durability.

This summary was generated by AI based on customer reviews.

The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.
Page 1 Showing 1-20 of 298 reviews
  • Pros mentioned:
    Performance

    Rated 5 out of 5 stars

    A Game-Changer for On-the-Go Power Needs!

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    Posted . Owned for 3 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    I recently purchased the Cobra CPI500W Power Inverter from Best Buy, and I must say it has exceeded my expectations in every way possible. This sleek and powerful device has become an essential companion for my on-the-go lifestyle, providing a reliable source of power whenever and wherever I need it. The first thing that caught my attention is the stylish design of the power inverter. The black color and compact size make it visually appealing, and it seamlessly blends with the interior of my car. The build quality is top-notch, giving it a sturdy feel that instills confidence in its durability. One of the standout features of the CPI500W is its impressive 500-watt power capacity. This inverter effortlessly handles a variety of electronic devices, from laptops and smartphones to small appliances. The consistent power output ensures that my devices operate smoothly without any hiccups, making it an ideal choice for road trips, camping, or any situation where access to a power source is limited. The fast charge USB ports are a game-changer for me. With the CPI500W, I can charge my devices quickly and efficiently, eliminating the need to carry multiple chargers. The convenience of having both AC and USB outputs in a single device is a major plus, and it has significantly simplified my charging setup. Installation was a breeze, thanks to the clear and user-friendly instructions provided. The inverter securely fits into my car's power outlet, and the compact design allows for easy storage when not in use. The built-in protection features, such as overload and overheat protection, provide peace of mind knowing that my devices are safe from potential damage. In terms of performance, the CPI500W truly stands out. It delivers a consistent and reliable power supply, and I've experienced no issues with fluctuations or disruptions during use. The silent operation is another bonus, ensuring that I can enjoy the benefits of the inverter without any annoying buzzing or humming sounds. In conclusion, the Cobra CPI500W Power Inverter has proven to be a fantastic investment for anyone in need of a reliable and versatile power source on the go. Whether you're a frequent traveler, outdoor enthusiast, or simply want a backup power solution for emergencies, this inverter is a must-have. I highly recommend the Cobra CPI500W to anyone looking for a high-quality power inverter that delivers on both performance and convenience.

    I would recommend this to a friend
  • Pros mentioned:
    Power output, Usb

    Rated 5 out of 5 stars

    Great source of on the go power

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    Posted . Owned for 3 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    The cobra 500 watt power supply Is great. I recently went on a long trip where I was working from my truck when my laptop and phone were dying and with the cobra I was able to supply power to both devices at the same time. Highly recommended if you’re always on the go and don’t have a inverter in your vehicle!

    I would recommend this to a friend
    • Brand response from Cedar Electronics Team
      Posted .

      Thank you so much for the amazing review and for the recommendation! cedarelectronics-cobra

  • Rated 4 out of 5 stars

    Needs shorter/redesigned cigarette plug

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    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Works well. Charges laptop, power bank, and phone, simultaneously with ease. The plug however need a redesign. It pops out of newer(shallow) car cigarette lighters easily. At first, I thought something was wrong with the inverter. It would power up and immediately make a fault beep and the LED would turn red. The beep and LED would fade slowly. It took a minute to realize that the plug was slightly pushed out. Switch cable with one from an older broken inverter and have had no issues since. Included cables are also extremely short. Pic attached, bottom one is the included plug.

    No, I would not recommend this to a friend
  • Rated 5 out of 5 stars

    Good Solid Build

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    Posted . Owned for 1 week when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    The build quality on the product is very solid and feels very premium. Very easy to setup and use. Instruction manual is very straightforward and helpful.

    I would recommend this to a friend
  • Pros mentioned:
    Power output
    Cons mentioned:
    Noise

    Rated 4 out of 5 stars

    Works without issue.

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    Posted . Owned for 4 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    It works like it should, however, I have a different one that I actually like better. This one is quite big compared to that one, and the wattage isnt off by that much. But it definitely will work for your needs most likely. Ive plugged in a power hungry laptop, with phones and other devices, and it handles no problem. Definitely will get hot if you arent careful. Its also a little louder with all that stuff. Its nice to have a usb-c.

    I would recommend this to a friend
    • Brand response from Cedar Electronics Team
      Posted .

      Thank you for your valuable feedback. It's normal for power inverters to create radio noise. If you are experiencing interference, here are some steps to help minimize it: Connect a #12 wire from the ground lug on the inverter to the vehicle's chassis. Keep the wire as short as possible. If you still notice interference, check if it disappears when nothing is plugged into the inverter: Unplug everything from the inverter. Ensure that nothing is connected to the AC outlets, not even an extension cord or power strip. Turn on the inverter and see if you continue to hear the noise. If the noise is no longer present, installing an AC line filter may help. cedarelectronics-cobra

  • Pros mentioned:
    Ease of use, Power output

    Rated 5 out of 5 stars

    Versatile and Efficient Portable Power Solution

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    Posted . Owned for 1 week when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    he Cobra POWER 500 Watt Power Inverter with Fast Charge USB in black is a versatile and efficient solution for those who need to power or charge devices on the go. With its compact design and reliable performance, this power inverter is perfect for road trips, camping, or emergency situations. Build Quality and Design: The Cobra POWER 500W inverter boasts a durable and well-built design that can withstand regular use. Its compact size and black finish give it a sleek appearance, making it a stylish and functional addition to any vehicle. Performance and Features: With 500 watts of continuous power output, this inverter is capable of powering a range of devices, from laptops and smartphones to small appliances. The Fast Charge USB port allows for quick and efficient charging of USB-compatible devices, while the two AC outlets provide ample power for other electronics. Safety and Protection: The Cobra POWER 500W inverter is equipped with multiple safety features, including short circuit, over-voltage, and low voltage protection. Additionally, it has a built-in cooling fan to prevent overheating, ensuring the inverter remains safe and reliable during use. Ease of Use: The inverter is incredibly easy to use, with a simple plug-and-play setup. Connect it to your vehicle's 12V socket, and you're ready to power your devices. The LED indicators help monitor the inverter's status, making it user-friendly even for first-time users. Price and Value: Considering its performance, safety features, and versatility, the Cobra POWER 500 Watt Power Inverter offers great value at a reasonable price. This portable power solution is an excellent investment for those who frequently travel or need a reliable power source during emergencies.

    I would recommend this to a friend
  • Pros mentioned:
    Performance
    Cons mentioned:
    Noise

    Rated 4 out of 5 stars

    Loud fan and beeps, but works well

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    Posted . Owned for 1 week when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Worked as expected but incessantly beeps when overloaded and the fan goes under loud on it.

    I would recommend this to a friend
    • Brand response from Cedar Electronics Team
      Posted .

      Thank you for your valuable feedback. We appreciate you choosing Cobra! The sound from the fan is normal, and the indicators on the power inverter display the unit's power status as well as any alarms for conditions that may cause it to shut down. If you need assistance, please feel free to contact us at 800-543-1608. We're happy to help! cedarelectronics-cobra

  • Pros mentioned:
    Usb

    Rated 4 out of 5 stars

    Know what youre buying.

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    Posted . Owned for less than 1 week when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Reading some reviews its clear some people know what theyre getting and some definitely do not. I do not use the 12v plug, theres no point. Why get a 500w inverter when it only runs 150w when plugged into the 12v port? Also this is modified sine, not pure sine. Some computers, tablets, medical devices could experience issues. If youre looking to plug something into 12v, get the scoshe the fan is a bit loud but works great. Now i got a 200amp fuse on amazon and i got a 20 ft 4awg jumper cable and cut it, stripped it, and put connectors on it. You can also buy the car audio amp kit at bestbuy which is basically all you need to connect this to your battery. I feel like this is cheaply made but i purchased it because the remote connector is available through best buy. Otherwise you're better off with the wagan slim line. 5* it works, no issues so far, cheaply made. Just got to 5* cause it works. 4* is a very reasonable judgment too.

    I would recommend this to a friend
  • Rated 4 out of 5 stars

    Does the job for lower powered applications.

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    Posted . Owned for 3 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    This has been really helpful for me to keep my laptop charged and run other devices in my truck. Do not use it much, but it stays in the truck and so far, does the job when needed. Power is a little low, but the low price relative to higher power models, does put it in a sweet spot. I initially thought I would have to return it as it kept cutting out and beeping like crazy. This device is not happy when power fails and devices are connected. There were two operator errors! First ensure the 12v plug is fully seated and not at risk of being bumped / momentarily disconnected. Second, you may need to disable your auto engine cut off as when the engine restarts, it will drop power to the inverter.

    I would recommend this to a friend
  • Pros mentioned:
    Power output, Usb
    Cons mentioned:
    Noise

    Rated 4 out of 5 stars

    Cobra Portable Power

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    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Very good product but more than we need to power laptop. Plenty of connections for other devices. Connections were easy and unit was not overly loud when fan kicked on.

    I would recommend this to a friend
  • Pros mentioned:
    Power output

    Rated 4 out of 5 stars

    Works as advertised

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    Posted . Owned for 3 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    I needed this to provide power for a laptop, and worked fine. However, the cord is relatively short (16 inches), which is too short to place on the floor of the car. Also, it should be noted that the full 500W of power is only available if connected directly to the battery. When plugged into an outlet in the car the max power is cited as 120W.

    I would recommend this to a friend
    • Brand response from Cedar Electronics Team
      Posted .

      Thank you for the great review and for choosing Cobra! The 12V accessory cable can support up to an average of 120 Watts. Please consult your vehicle manual to determine the maximum load that your vehicle's accessory port can handle. cedarelectronics-cobra

  • Rated 5 out of 5 stars

    Best power inverter!

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    Posted . Owned for more than 2 years when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    The Cobra POWER 500 Watt Power Inverter is a reliable and efficient device for powering electronics on the go. With a sleek black design, it features multiple AC outlets and a fast-charge USB port, allowing you to charge several devices simultaneously. Its 500-watt output is suitable for laptops, smartphones, and small appliances. Safety features like overload and short circuit protection provide peace of mind. Compact and easy to install, this inverter is perfect for road trips, camping, or as a backup power source. Overall, it’s a valuable addition to any travel gear or emergency kit.

    I would recommend this to a friend
    • Brand response from Cedar Electronics Team
      Posted .

      Thank you so much for the outstanding review and for choosing Cobra! cedarelectronics-cobra

  • Rated 4 out of 5 stars

    Cobra power inverter

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    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    This little inverter does the trick when using air mattress pumps and keeping things cold in the lil fridge. I recommend this product for compact trucks and cars. This is also priced right for the value.

    No, I would not recommend this to a friend
    • Brand response from Cedar Electronics Team
      Posted .

      Thank you for the wonderful review and for the recommendation! cedarelectronics-cobra

  • Rated 4 out of 5 stars

    Works good for most part

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    Posted . Owned for 3 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Works ok, just didnt realize the full 500w was only usable through the clamps. And only 140w max i believe using the in vehicle power

    I would recommend this to a friend
    • Brand response from Cedar Electronics Team
      Posted .

      Thank you for your review. The 12V Accessory Cable can support on average up to 120 Watts. Please refer to your vehicle's manual for more information on the maximum load your accessory port can handle. If you have any questions, please contact us at 800-543-1608. cedarelectronics-cobra

  • Pros mentioned:
    Performance

    Rated 4 out of 5 stars

    power

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    Posted . Owned for 3 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    reliable to our mountain trip and even dependable its good

    I would recommend this to a friend
    • Brand response from Cedar Electronics Team
      Posted .

      Thank you for the fantastic review! We hope you had a great trip! cedarelectronics-cobra

  • Pros mentioned:
    Ease of use, Power output

    Rated 5 out of 5 stars

    Perfect for in vehicle work stations

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    Posted . Owned for 3 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Plenty of juice to run about anything you could need in the car. I even ran an electric heating pad for my daughter when her stomach was hurting. I use mainly to charge drill batteries, faster phone charging and charge my laptop on the go. If I needed to I could even bring along my printer if I needed to print documents on the go.

    I would recommend this to a friend
  • Pros mentioned:
    Price, Usb

    Rated 5 out of 5 stars

    best purchase

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    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    for the price this was perfect and a life saver and it comes with cigerette lighter connector too

    I would recommend this to a friend
    • Brand response from Cedar Electronics Team
      Posted .

      Thank you so much for the great review and for choosing Cobra! cedarelectronics-cobra

  • Rated 4 out of 5 stars

    Charger Box is Decent

    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    The charger is very good. Sadly the cord that connects to the cars 12v compartment is too small it needs to be extended longer

    I would recommend this to a friend
  • Pros mentioned:
    Power output, Price

    Rated 5 out of 5 stars

    Power to spare!

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    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    This 500 watt power inverter appears to be very well made and functions quite well. It stays cool when under load, and it has plenty of power for the 180 watt AC adapter to power my gaming laptop. Only wish I had purchased a true sine wave inverter, but for my current use, this model works just fine.

    I would recommend this to a friend
  • Pros mentioned:
    Usb

    Rated 4 out of 5 stars

    Close to what I needed.

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    Posted . Owned for 3 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Fits underneath the shifter console of the Prius. Relatively quiet. Wish it had three outlets and more available power. It was all I could afford. Boondocking/car camping.

    I would recommend this to a friend