Satechi Launches 72W USB-C Car Charger and MFi-Certified USB-C to Lightning Cable

Has anyone done studies on how this can negatively affect car battery? I had Aukey car charger USB-PD 15W. My new car battery went off within 2 months. VW were terrible and kept saying that my car charger was to blame.

72W and such small form factor, I don’t think is possible

Has anyone done studies on how this can negatively affect car battery? I had Aukey car charger USB-PD 15W. My new car battery went off within 2 months. VW were terrible and kept saying that my car charger was to blame.

Are you charging while your car is off? I think someone is feeding you a line. Your alternator tends to put out about 14V unless you are constantly at low idle (and even then enough voltage not to matter for these purposes) and probably 85 amps or so (maybe less on your specific car but again not enough to matter for these purposes). So 14v * 85a = 1190w, 15w of draw is meaningless.

Even if the vehicle is off, unless you were routinely drawing the battery very low or killing it (which would be very unlikely even at max 15w draw of that charger) it shouldn't have affected battery life. If the car was running it should never have hit the battery at all.

edit to add: for comparison your starter motor probably draws hundreds of amps when you start your car (run continuously those motors are probably around 1kw) and that's pure battery. Granted much shorter period but its disingenuous for the dealer to be concerned about your 15w draw (only while a device is connected and needing full speed charging) vs 1kw plus of starter motor draw. It doesn't add up.

edit to add more: you should ask them if they are concerned about the likely 50w+ car stereo (although I won't go into all the ways that car stereo power is mis-rated) installed by the factory

Has anyone done studies on how this can negatively affect car battery? I had Aukey car charger USB-PD 15W. My new car battery went off within 2 months. VW were terrible and kept saying that my car charger was to blame.

I’m certainly not a battery expert but if you drive your car on a regular basis then you shouldn’t have any issues. The alternator recharged the car battery really fast. If driven regularly then the car charger shouldn’t have enough time to negatively harm your battery.

I once had a car charger that had a little green light that would stay on to show it was getting power. I worked out of the country for four months and it ran my battery down. A simple jump and short drive got the battery back up to normally. That wouldn’t have been an issue if I had been driving my vehicle.

Seriously? 6 amps this plastic will melt.

The amperage has nothing to do with the plastic and everything to do with conductor size. If this thing has internal wires/buses of proper size and material, 6 amps won't cause a significant temperature rise. I regularly work with conductors about the same diameter as my little finger that carry over 12,000 volts at over 150 amps yet remain within 5 degrees of ambient temperature.

72W and such small form factor, I don’t think is possible

Time to remember power formula calculation

P=U*I
72W=12V*I

I = 72/12 = 6 Amps...

Seriously? 6 amps this plastic will melt.

My two cents but I thing there is 72 W for half a second, so they can get validated product name/description but mostly will use max 0.5 amp
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Time to remember power formula calculation

P=U*I
72W=12V*I

I = 72/12 = 6 Amps...

Seriously? 6 amps this plastic will melt.

My two cents but I thing there is 72 W for half a second, so they can get validated product name/description but mostly will use max 0.5 amp

Haha it's 60 + 12