Product Features and Description
- Top-Ranked Brand: BESTEK power inverter is a leading brand in America known for its high-quality power inverters. It offers 300 Watts continuous DC to AC power and 700 Watts instantaneous power, featuring 2 AC outlets and 2 USB ports.
- Quick Charging: The BESTEK power inverter comes with two 110V AC outlets perfect for charging larger devices like laptops and tablets, along with 2 USB charging ports (0-2.4A), making it an excellent choice as a necessary car accessory for universal travel adapter.
- Portable Design: The power inverter from BESTEK is designed to be ultra-compact and lightweight, similar in size to an iPhone, making it ideal for vacations, work trips, and camping. It includes a 24-inch cigarette lighter plug that allows it to be plugged into almost any vehicle.
- Comprehensive Protection: The BESTEK power inverter comes with a built-in 40 amps fuse for device protection. Its safe charging design offers protection against overheating, under and over-voltage charging, and short-circuiting.
- Durability and Silent Operation: The power inverter has a durable metal housing that provides superior protection from drops and bumps. Its smart cooling fan system ensures silent operation. The fan speed increases when the device heats up or when the output power exceeds 70W. It also comes with an 18-month warranty.

The BESTEK Power Inverter, recognized as America’s top power inverter brand, ensures a reliable transformation of 300 watts continuous DC to AC power and delivers a peak power of 700 watts. This premium product, specifically designed for DC 12V and Car use, is not compatible with DC 24V and airplane use. Boasting of 2 USB ports and 2 AC outlets, it provides an efficient solution for powering your devices on the go. However, it’s recommended to keep one USB port free when charging your iPad through the 2.1A USB port.
The power inverter’s exterior is made of high-quality Aluminium alloy, ensuring a solid and durable structure that can withstand severe environments. Its smart cooling fan system ensures silent operation, with the fan speed increasing when the device gets warmer or when the output power exceeds 70W. This design provides protection against overheating, under and over voltage charging, short circuiting, overloads, and overcharging. It also includes two smart USB charging ports that can intelligently detect your devices and deliver the best-matched charging current for fast charging speed. Each port offers auto 0-2.4A, with a total output of 4.8A.
The BESTEK Power Inverter also functions as a universal travel adapter, making it a perfect companion for long trips. The 24-inch cigarette lighter plug allows the power inverter to be plugged into almost any vehicle, transforming it into a universal power inverter for car adapter. With a lighter socket that can withstand up to 5000 insertions and extractions, it ensures a stable and secure connection. Built-in USB charging ports and a plug-in buckle design provide a stable current for high-speed charging. Its unique ability to power LED lights makes it ideal for creating festive atmospheres during Christmas and other celebrations.

- Product Dimensions: 4.8 x 3.1 x 1.9 inches
- Item Weight: 10.1 ounces
- ASIN: B004MDXS0U
- Item model number: MRI3011BU
- Best Sellers Rank: #514 in Automotive (See Top 100 in Automotive) #6 in Power Inverters
- Is Discontinued By Manufacturer: No
- Date First Available: February 5, 2011
- Manufacturer: BESTEK
- Country of Origin:
- Brand:
- Model:
- Manufacturer Part Number:
- Voltage: 12 to 110 volts
- Wattage: 300w
- Package Dimensions:

Navigating the Trade-offs: The Upsides and Downsides of the Product
Several customers have expressed satisfaction with the product, citing its usefulness for a range of applications. A customer, Nkarna, mentioned how the product served as an excellent inflator for an air mattress during a camping trip, scoring it a 5-star rating. Similarly, Tina Garbarino claimed it to be the best power inverter she had used after going through three others. She also pointed out that it’s a product you can’t cheap out on, indicating its quality.
The compact size and charging capabilities of the product also seem to have won over many users. Richard Kearney commended the product for its efficiency, allowing him to use Bluetooth in his 2003 Tacoma. Another user, Michael, applauded the product’s portability, stating that it worked well with his small laptop in his car. Users also appreciated the inverter’s low noise level while in use.
Furthermore, the product’s long-term performance and durability have also been highly praised. As noted by user T. Estrick, the product has remained sturdy, durable, and reliable even after several years of use. For Krystal, it has become a constant companion during car trips and camping, used frequently to charge a computer and phone.
Despite the numerous positive reviews, the product has also received its share of criticism. Several customers expressed disappointment over the product’s reliability and functionality. For instance, user Mumbles complained about the product going into fault mode without anything plugged in. Nursing101 shared a similar experience, stating that the product did not work the first time it was used right out of the box.
Other users have had issues with the product’s longevity and its impact on other devices. Derek Ramp, for instance, lamented how the product burned through three fuses in his truck after just two uses. Another customer, Just me, was upset that the product broke the auxiliary power outlet in their new car after one use.
Lastly, some customers questioned the product’s power capabilities. Charles Stark noted that the product doesn’t do anything a cigarette adapter wouldn’t do and that it doesn’t power much. Mike also reported that the inverters do not work properly, turning on and off every second, making it impossible to charge. He further criticized the company’s customer service for not responding to messages for help or warranty.
What do the stars speak of?
Opinions about this product were divided in such a proportion among the buyers.
I was really worried because I have an air mattress that has a built in pump, i didn’t know if that was going to be an issue. But damn! This thing really pulled through and did an amazing job. Totally need this if you’re inflating beds/floats on a camping trip. Totally awesome.
Goes in fault mode without anything plugged in! 🤬

Queries & Clarifications: All You Need to Know
1. How does the BESTEK 300W power inverter for car work?
The BESTEK 300W power inverter works by converting DC 12V power from your car’s battery into AC 110V power. This allows you to power or charge devices such as laptops, phones, tablets, and other electronic devices in your car. The inverter plugs into your car’s cigarette lighter socket and has 2 USB ports and 2 AC outlets for connecting your devices.
2. Is the BESTEK 300W power inverter a universal adapter?
Yes, the BESTEK 300W power inverter can be considered a universal adapter as it can be used to power or charge a wide range of electronic devices. However, it’s essential to note that the inverter is designed for use with DC 12V and cars only. It’s not suitable for DC 24V and airplane use.
3. Can the BESTEK 300W power inverter handle high power electric devices?
No, it’s not recommended to use the BESTEK 300W power inverter to power high power electric devices such as hair dryers and electric heaters. These might draw too much power and blow a fuse in the inverter.
4. Is the BESTEK 300W power inverter safe to use?
Yes, the BESTEK 300W power inverter is safe to use. It features a safe charging design that provides protection against overheating, under and over voltage charging, short circuiting, overloads, and overcharging. Its aluminium alloy shell also protects the internal components from severe environments.
5. Does the BESTEK 300W power inverter get hot during operation?
It’s normal for the inverter to become warm to the touch while you are using it. The inverter has a smart cooling fan system that operates silently and runs faster when the device gets warmer or when the output power exceeds 70W to keep it cool.
6. How many devices can the BESTEK 300W power inverter charge at the same time?
The BESTEK 300W power inverter has 2 USB ports and 2 AC outlets, so you can charge or power up to four devices at the same time. However, it’s important to ensure that the total power consumption of the devices does not exceed the inverter’s capacity.
7. Can the BESTEK 300W power inverter be used for long road trips?
Yes, the BESTEK 300W power inverter is an ideal choice for long road trips. It can keep your devices powered or charged during your trip, and its durable design allows it to withstand the rigours of travel.
8. How long is the cable that connects the BESTEK 300W power inverter to the car’s cigarette lighter socket?
The cable that connects the BESTEK 300W power inverter to the car’s cigarette lighter socket is 24 inches long. This gives you some flexibility in where you place the inverter in your car.


krc –
Well made but a few dollars more buys much better
Very solidly made but poorly designed. A noisy fan turns on with power even when not needed. Very inefficient in power conversion, especially ruinous for small loads but bad enough at its middle load peak efficiency (83%).
Gorilla Sapiens –
no reverse polarity protection, not user servicable
got this to use for a project, and had to hack the connector off for my application. and i accidently connected it reverse polarity. that’s all my fault. of course it popped. i opened it up to see if there was anything i could repair. it is not meant to be serviced. there is no way to take it apart completely without a soldering iron. there’s what looks like a 5A fuse in there, which i think i blew, but it too is soldered to the board. this device is not robust to reverse polarity and was never intended to be serviced. it’s just easier / better for me to find another one that is not quite as poorly made.
René Alejandro Martínez Gonzalez –
Lol
Funciona de maravilla.5 stars
Gustavo Neira –
Buen producto
Llego a tiempo en buen estado y funciona de maravilla
G46893 –
Poor quality
Purchased in August but didn’t start using until October and was using it once a day for 20 minutes to cook some steel cut oats, worked for approximately 3 months and stopped working doesn’t turn on anymore checked the plug and fuse plug is good. Assuming something internal burned out. Don’t waste money on this inverter.
Thinh Dominick Bui –
Nice little unit for road trippers with gadgets like me.
Good for road trippers like me who need to use my car as a power station and charge my various gadgets. Until I get a nice battery/power station, this little unit will suffice. This things is good for charging my drone, gaming laptop, cameras, phones, and lights. Great little thing. People recommend to keep this thing flat and horizontal, and to not block the fan in the rear. Do not plug large appliances into this thing. You will blow a fuse.
David Houck –
⚡ A Must-Have for On-the-Go Power! 🚗
The BESTEK 300W Power Inverter is an absolute game-changer for road trips and daily commutes! It easily converts DC 12V to 110V AC, allowing me to power up laptops, phones, or small electronics from the car. The 4.2A dual USB car adapter is incredibly convenient, letting me charge multiple devices at once without any issues. It’s compact, efficient, and reliable—perfect for anyone who needs power on the go. Whether you’re traveling or just need some extra charging capacity, this inverter has you covered! 🔌💻
Lucas –
Only output 88 volts, did not work well
Wouldn’t power anything so I checked with a fluke multimeter and it only outputs 88 volts.
Rebecca Marton –
Works great
This works great and is a great price!
pochemuchka –
unreliable, AND does not provide sufficient power
The media could not be loaded. advertised 300W is not able to charge electric scooter (110W) and maintain (not charge) laptop operation. You can say the product is not as described. One reason could be that most cars’ cigarette socket is only rated to provide 180W power, so whether or not this device is 300W continuous/700W peak is moot, since this is beyond the fuse capacity of the vehicle, any vehicle. Furthermore, 5 weeks into using, the fan has started to rattle. Because of the fan noise, I recomment against buying, as it might fail you the moment you most need it.
Not satisfied –
It broke my car
When I connected this device to my car – my fuse burned out and the cigarette lighter no longer works. I thought it was the car, so I tried to connect it to another one, the same thing. I highly do not recommend it.
David –
Excelente
Muy buen producto… ojo es de 300 watts por tanto solo artículos de bajo voltaje muy bueno y duradero
Anna k. –
AVOID THIS PRODUCT AT ALL COSTS
I WOULD GIVE IT A 0 IF I COULD…. PLEASE DO NOT BUY THIS PRODUCT!! I only used it ONCE!!!!! Literally plugged it in and my car’s battery gave up after a few moments. Then all these lights turned on right after… now this is going to cost me literally THOUSANDS. 😒 An absolute GARBAGE!!!!!
RetireD –
Excellent Inverter for the price! Outstanding customer support!
I purchased the BESTEK 300W 12VDC -> 110VAC Inverter to power a prototype solar-powered water pump system that I designed and built. The battery I’m using is a small 12V/20Ah LiFePO4. It’s charged with a solar panel and solar charge controller. I had a few questions for the manufacturer about the DC input range of the inverter. They were very responsive and helpful. The prototype solution is working flawlessly. I highly recommend this BESTEK 300W Inverter – and will be purchasing more in the coming months.
Jorge E. Bacci –
Good product
It’s a very complete device
Gumby –
RETURNED
USELESS
Antony García –
Gracias
Gracias
Harry Balzana –
Didn’t Last
I used it for work charging dewalt batteries. I lasted 3 months. It lights up but no output 110v. I took it apart and there is no fuse to replace. I was hoping to fix it but it’s now useless and I wasted money.
Edward Gurule –
Great size and works great
It’s a perfect size and well built.
NH ANDY –
Most Excellent
Works great 👍
Seth L. –
terrible
didnt work period. plugged it in nothing. ended up going to harbor freight.
Kathryn J Wyatt –
Inverter
I like the idea of 2 outlets as well as 2 usb. This will be a great addition to my hurricane supply collection.
Jennifer Salcedo –
Overheat
It makes to much annoying whining noise and it overheat as soon as you plug it in , wouldn’t recommend it.
Joshua Greene –
Good buy
Put one in all of my field trucks to power laptops and wifi units. Never had a problem.
Amazon Customer –
Waste of money
Had this product for one month, used twice and just went to use for a car trip and blew a fuse. Don’t buy!
Doug –
Didn’t last a month
Only had an iPhone plugged into the usb while driving and heard a loud pop and it started smoking. Think I got 2weeks out of it.
Michael Miranda –
Not 300w
Connected 100w light to it and the light was very dim
Kenny –
No mounting points but its well constructed
I recently took a new job and with that job came the need to be more mobile, but the vehicle I was given to drive is a 2013 F350 with very low miles and aside from power windows, it leaves little to be desired. There is no bluetooth, no charging ports, and storage is almost non existent. I bought this hoping to mount it somewhere on the dash so that I had a way to charge devices on the go and it serves that purpose. It doesn’t have any mounting points, so be advised if this is a deal breaker for you. It would’ve been a nice feature given the good quality, but it wasn’t a deal breaker for me.
Chip board –
Amazing
Amazing
RILDO ESTEVES –
I just use it oct/2024 and works fantastic !
I live in a country with really bad energy cuts now and i use this power inverter after years of purchase and just work great. Bought it on 2018 by the way. I just got back to write this review in order to help others. I use it for a 32″ and did not heat up just stood warm and no problems at all.
Melinda Simmons –
Very convenient
Gets the job done.
KGBeezer –
Good product, good value
Took this on a family trip for 10 days. It worked very well and provides options for charging.
Becky L Livermore –
Works great!
It works great and easy to use. Very convenient
Ivette –
This tiny box is powerfull
I love it to charge my battery for my blower that I use when I go to customers and leave my containers nasty
Jony –
It worked for the time being.
Is it reliable I dont know for sure. But I only needed to use this once or twice. And it worked for my use case.
William –
Perfect for me
Exactly what I needed for my company vehicles to power everyone’s accessories.
Liar –
Does not work as described
I have a gaming labtops that pulls exactly 225w max. The best tek claims it can handle up to 300watts with 11-15v. It cannot even Handle a little tablet at 65watts.
Egor –
Good quality ))
One drawback, two plug don’t fit. (
Tom –
Will not work with Tesla
Will not work with Tesla
Brian –
Works as intended
Works well. Had no trouble
Jason stefani –
Junk
Horrible didn’t even work when I got it
Joseph –
Reliable
Im a truck driver and this has saved my life when it comes to charging my devices FAST had it for 2 years but i recently damaged it. But i liked it and depend on it so much i bought another one. Very happy with this product 👌🏻
S Hanson –
Good for travel
The BESTEK 300W Power Inverter is a reliable choice for road trips. It efficiently converts DC 12V to AC 110V, powering devices with ease. The dual USB ports are a handy addition for charging phones. Its compact design fits well in the car, and the build quality feels robust. A must-have for travelers needing a convenient power source on the go.
abv5hc –
As described
Durable, easy to use, great for traveling.
Rome –
trash
You cant fit two phone chargers to outlet. I would never by from the seller again. Refund please!!!
Peter Simone –
Does it’s job.
This little power inverter does what it says it’s gonna do. It’ll power a couple laptops or similar devices on a long car ride. Dual usb ports are nice to have. Small firm factor is a plus. It’s a lower capacity inverter so it won’t power anything much bigger. Good for what it is and good for the money.
Mitch Ripke –
Awesome product.
I love these so much, that this is the second one of these that I have ordered. I use them in my business vehicle and they are indispensable. They are turned on daily, and don’t run the battery down in the vehicle, which is a HUGE plus for me.
Servehim –
Great tool to have for automobiles
I purchased this a while ago, it’s a great instrument for your car. Has many uses like heating hot coffee with plug or charging multiple devices with Usb ports.
Mike L. –
Works awesome
Small enough but dependable
mike herman –
worth the money
does just what its supposed to do no issues at all !!!