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Using it to power a 19" LCD TV in my truck, the TV draws 40 watts and my truck (1500) has 20A accessory plugs. Works great, no problems. Note - this thing is much smaller than the Amazon page says - maybe 6"x4"x2" and easily fits in my center console.
The Tripp Lite has no fan and plenty of power for the laptop. They would often shut down when the laptop was plugged in.
We use it on the road for GPS, and also for Internet when near a wireless hotspot (which are easy to find). We take a lot of trips, and the laptop always goes with us.
The small 100 watt inverters that plug directly in the 12 volt outlet were not enough power - barely. I needed a replacement inverter since my last inverter was not "coffee proof".
I did not want a large inverter since my only need is to power the laptop. Larger inverters with fans can be noticeably loud.
Never overloaded or abused. I have used this unit occasionally. Used for less than 10 hours total within year and half since I bought. I only hooked up my laptop to it. It just died (blows the fuse when turned on).
works just fine. used it to charge digital camera batteries via their standard AC chargers last trip.
This hum may not be audible in cars that are not as quiet as mine (2002 Toyota Camry Solara hard top) or with different loads (I am using the inverter to drive a very quiet air filter which is probably more suceptible to the PWM transients). Product works as advertised. The pulse width modulation (PWM) switching approach has one drawback: at low driving speeds, there is a hum which is audible above the road noise of the car. The unit has a maximum efficiency of 90%. I tried to get efficiency figures before purchasing the unit but was unable to find same.I am happy with the performance of the device.
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