Amazon is selling a ‘reliable’ $40 car outlet power inverter for 42% off, and shoppers say it 'works wonderfully'

Autoblog aims to feature only the best products and services. If you buy something via one of our links, we may earn a commission.

Amazon is selling a ‘reliable’ $40 car outlet power inverter for 42% off, and shoppers say it 'works wonderfully' originally appeared on Autoblog.

Autoblog aims to feature only the best products and services. If you buy something via one of our links, we may earn a commission.

Turning your car’s 12V outlet into a functional power source can make road trips, workdays, and emergency situations a whole lot easier. Whether you're charging a laptop, running small appliances, or just powering up multiple devices at once, a compact power inverter can be one of the most useful devices to keep in your glove box.

The Bestek 300W Portable Car Outlet Power Inverter is one of the top models on the market with thousands of five-star ratings at Amazon, and it’s currently on sale for $23 during Prime Day, down from its original price of $40. At this price, it’s an affordable upgrade for anyone who wants a reliable way to convert DC power to AC on the go, whether you're going to the office, heading to the job site, or just staying prepared for the unexpected.

Bestek 300W Portable Car Outlet Power Inverter, $23 (was $40) at Amazon

Despite its small size — measuring 4.8 inches long, 3.1 inches wide, and 1.9 inches high — this unit delivers 300W of continuous power and 700W of peak power. It features two AC outlets for laptops, tablets, or anything else you want to plug in, plus two USB ports for phones and other small devices. A 24-inch cord gives you some flexibility with placement in your vehicle, and a built-in cooling fan keeps it running quietly and efficiently. The metal housing adds durability, and safety features include protections against overheating, over voltage, and short circuiting, with a 40-amp fuse for added peace of mind.

People who have bought it say this inverter does exactly what it promises. One called it “perfect,” while others described it as “useful,” “reliable,” and “works wonderfully.” Its quiet operation also stands out, with one noting it’s both “silent and powerful.”

Related: Amazon is selling a 'powerful' $70 cordless leaf blower for $30, and shoppers say it 'works better than the DeWalt'

Many buyers also praised the quality and value. “The build quality is exceptional,” one reviewer shared, while another simply said, “you do not need to look anymore because you are looking at the best.”

Amazon’s Prime Day deals are only here for a limited time, so head over there now and pick up the Bestek 300W Portable Car Outlet Power Inverter for only $23 while it’s over 40% off.

Amazon is selling a ‘reliable’ $40 car outlet power inverter for 42% off, and shoppers say it 'works wonderfully' first appeared on Autoblog on Jul 8, 2025

This story was originally reported by Autoblog on Jul 8, 2025, where it first appeared.