Cobra Electronics via Ebay has Certified Refurbished Cobra Power 500W Power Inverter Portable Car Charger for $ 18.39 when you use coupon code LABORDAY20 at checkout
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Cobra Electronics via Ebay has Certified Refurbished Cobra Power 500W Power Inverter Portable Car Charger for $ 18.39 when you use coupon code LABORDAY20 at checkout
"With 500 Watts of Modified Sine Wave power, you'll be able to charge and power your entertainment devices and appliances safely and reliably."
This is such nonsense. They make modified sinewave sound like a desirable feature when it's actually the opposite of safe and reliable. It's not safe because it stresses components that have been designed to operate on a standard sinewave, and its not reliable because some devices literally wont even work with such a butchered approximation of mains power.
$18 just means you're paying less for something that wont work with that one device you need it to work with one day, and will contribute to premature component failure on most of the appliances it does work with.
Pure sinewave inverters are much more affordable these days than they used to be so the quicker this market dies the better.
Last edited by cainn24 August 31, 2026 at 09:32 PM.
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This is such nonsense. They make modified sinewave sound like a desirable feature when it's actually the opposite of safe and reliable. It's not safe because it stresses components that have been designed to operate on a standard sinewave, and its not reliable because some devices literally wont even work with such a butchered approximation of mains power.
$18 just means you're paying less for something that wont work with that one device you need it to work with one day, and will contribute to premature component failure on most of the appliances it does work with.
Pure sinewave inverters are much more affordable these days than they used to be so the quicker this market dies the better.
Join The Conversation
Share your experience with the Slickdeals community
Share information with the community. Please follow our Community Guidelines and be kind!