BESTEK 4.2A Dual USB Car Adapter and 110V AC Car Inverter 300W to Power Inverter DC 12V Power Converter Red

BESTEK 4.2A Dual USB Car Adapter and 110V AC Car Inverter 300W to Power Inverter DC 12V Power Converter Red

Q: When I plug my laptop into it, and then play music through my laptop I get really bad cyclical sound ... is there a way to filter this out?

I'm going with audio engineer dude on this one. But really what I wanted to address, is people saying it's due to it being a modified sine wave. That's not your issue. Laptops don't run on AC, they run DC, so first off sine type isn't an issue. Second, anything not straight off the main grid or a generator is a modified sine. There are better and worse, but if you're going DC to AC, it's modified sine. In all honesty though, if you're running a laptop off an inverter, the best thing would be to see if you can adapt straight from your original source to a laptop charger, bypassing the whole AC conversion.

Q: The descriptions and photos here show TWO(2) AC Outlets, but some reviews say it only has ONE(1). Which is it?

The unit that I received has 2 110v outlets and 2 usb ports. The unit was used on a recent trip to Texas and worked flawlessly.

Q: Will this drain the car battery and does the car need to be running to use this?

It depends. If you have an ICE car with an internal combustion engine and a small "starter/ignition" battery, you won't want to run anything more than a few hours, maybe less if your battery is older or you've run it to dead a couple of times already. But for my electric car, I've used a small inverter in the accessory jack to power small things for up to a week, and hardly noticed it.

Q: Will this work with/charge a 15 inch Macbook Pro?

Yes it works very well, and runs quietly.

4.5/5

Product ID: 740180015

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Details

Brand
BESTEK
Wattage
300 W
Color
red
Voltage
12 Volts
Total Power Outlets
2

⚡300W continuous power output

🔌2 AC outlets + 2 USB ports

🔥4.2A rapid charging capability

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Description

🔋 Stay charged, stay unstoppable — power your journey with BESTEK!

COMPACT YET MIGHTY - Sleek red design fits easily in your car, delivering heavy-duty power without bulk.
INSTANT SURGE POWER - 700W peak power handles sudden high-demand devices without missing a beat.
TRUSTED AMERICAN BRAND - Backed by 18 months warranty and durable metal housing for drop and impact protection.
POWER YOUR LIFE ON THE GO - Dual AC outlets and USB ports keep laptops, tablets, and accessories fully charged wherever you drive.
SMART COOLING SILENT OPERATION - Advanced fan activates only when needed, ensuring quiet, efficient performance.

The BESTEK 4.2A Dual USB Car Adapter and 110V AC Car Inverter delivers 300 watts of continuous power and 700 watts peak surge, featuring two AC outlets and two USB ports for rapid charging. Its compact, durable metal housing and smart cooling fan ensure reliable, quiet operation. Perfect for professionals on the move, it supports laptops, tablets, and other USB devices with an 18-month warranty for peace of mind.

Specifications

Total Usb Ports	2
Compatible Devices	Laptop, Tablet
Color Name	red
Batteries Included	No
Batteries Required	No
Brand	BESTEK
Item Model Number	MRI3011BU
Model Year	2014
Connectivity Technology	USB
Product Dimensions	12.19 x 7.87 x 4.83 cm; 408.23 g
Item Weight	0.9 Pounds

Have a Question? See What Others Asked

When I plug my laptop into it, and then play music through my laptop I get really bad cyclical sound ... is there a way to filter this out?

The descriptions and photos here show TWO(2) AC Outlets, but some reviews say it only has ONE(1). Which is it?

Will this drain the car battery and does the car need to be running to use this?

Will this work with/charge a 15 inch Macbook Pro?

Common Questions

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