Here is a link to get you there: In order to fit the waveform in the display, I had to double the scale on the left and increase it by a factor of 5 on the right, so the yellow curve is actually much worse than it appears. I have over two million new and used OEM and aftermarket cell phone accessories in stock. I’m puzzled by the steep voltage sag on both the iPhone and iPad charger. If you’re thinking of buying one, just get the TouchPad charger, instead. I dont think so. Samsung cube The Samsung cube charger is shaped very similarly to the Apple iPhone charger.
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I cannot find it anywhere, and in case of affirmative case, I wonder how much faster could the iPhone charge and if that faster charging even if not much could not slowly damage the battery folink lonf term.
For some reason, Indian Railways has V power sockets in trains. The counterfeit chargers are made by anonymous Chinese manufacturers, despite what they claim on the labels.
The DC is chopped up tens of thousands of times a second and fed into a tiny flyback transformer. Today, thank GOD for the alarm system and fast response from the fire department.
Ken that is above and beyond the call of duty.
When working above 1 amp most the wall chargers draw down below 4. Note the scale change due to the high current output. Tektronix make great scopes, but they also have a value power analyzer ‘PA’ that works from 2mW up. See footnote 16 for more details.
A dozen USB chargers in the lab: Apple is very good, but not quite the best
Here is a link to get you there: Even though I already bought one and use it daily without issues. If you insert it with the USB interface away from the grounding plug it will not work. The colorful orange charger is a counterfeit of the Apple UK iPhone charger. Although the label claims the charger works on volts, it’s clearly not designed to work on US power. As most of the time I have to charge my phone in the car.
Amusingly, semiconductor manufacturers have recently introduced chips that allow chargers to sequentially pretend to be different proprietary chargers until they trick the device into accepting the charger.
I think it’s fair to say that most of us will be using either a charger that came with the phone we bought manufacturer branded or one we buy from the carrier with the phone carrier branded. Per your recommendations cablle data I purchased an HP Touchpad charger.
Since HTC is doing well with their phones these days, why not review it. These A knockoffs have never been certified by Underwriters Labs and this is important to know. You can also weigh the charger if you have an accurate scaleand compare with the weights I give above. For safety and to avoid vaporizing the oscilloscope I used an isolation transformer. I’m told that genuine UK chargers have a serial number at the very back of the USB port looking into it, so take a look.
As that would interest a lot of Ham Radio guys and gals out here. It looks like the voltage is roughly constant underneath all the noise. Do you have any recommendations, or know of any to particularly avoid?
But I do have some preview pictures to hold you over until my teardown article. Also the ever-present threat of dubious quality counterfeit components from China.
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Thanks for the article. Just found this blog when looking for information on HP touchpad chargers. The HP charger was the winner here.
So the author should have tested first if the charger was a standard USB-charger or Apple-crapped. Samsung cube The Samsung cube charger is shaped very similarly to the Apple iPhone charger.
Your awful numbers moorola the Bellingham charger made me think that even trusting a name brand might not be good enough. Description Roker USB dongle is the very first solution available on market supporting all Motorola models.