Mechanical characteristics
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The loader is slightly larger than others, 5.5cm long, 4.2cm high (8.5cm incl Euro plug), and it measures at the widest point 3.3cm, 2.1cm towards the Sony original, that does not interfere in the travel bag, but he blocked on my multiple socket at the Euro plug connections and the adjacent slots.
The housing has a slight waist so you can safely unplug the charger even if do not want him Parental Control an electrical outlet again give the same. The USB connector fits well and does not wobble, and the glossy black plastic ("piano finish") makes a solid impression.
Since the casing is assembled you can feel slight ridges, completely waterproof, it should not be open due to the USB plug gaps, but all this does not interfere in normal circumstances. Mechanically, the charger is so for this price range OK.
Electrical Properties
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Since I have the opportunity to access an accurate power meter, I have therefore tested the adapter. Standby power consumption (Power consumption without a connected mobile phone) is 0.1W (or 0.1VA for quite fussy) with a power factor of (on average) about 0.98 - 0.99, which is an acceptable value for a budget unit in my opinion. But it gets even better: the quiescent current of the Sony original charger is even lower, below the measurement limit of my instrument.
Any humming or whistling noises I could not perceive, although the garish blue control LED is handy, but disturbing, I glue a stamped with the office punch round piece of greaseproof paper on it, then it's good. Other reviewers have got with their handlers also a suitable USB cable, in my case was none, but that was also promised anywhere in the product description.
Service
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Shipping and service were exemplary, despite the Christmas holidays, even the support answered promptly, too, is at the lower priced units not always so.
Conclusion
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All in all I am very happy, I had expected considering the low price with worse and was pleasantly surprised. Could be damaged by hail the good per se review only a premature failure of a loader, I have been 3 identical in operation, let's see if they persevere, I report if necessary on failures.
1/2015 AL
Impertinent look (only for those interested)
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When I read the negative reviews I have the impression that some reviewers have not much idea of charging technology, voltage and current, or the Zickigkeiten their terminal blamed the chargers.
A USB charger has a constant supply of the USB standard and irregular voltage of 5V, and the charging electronics in the terminal (!) Determines how much current A retrieves them from the charger and pumped into the battery. "Fast charging" with a higher voltage, like the earlier times was in the lead-acid batteries from cars (at the expense of life by the way) is in mobile phones and tablets is not possible, at least not by the charger - nevertheless be "fast charger" touted - paper is just patiently.
The Mumbi charger can deliver up to 2.1A at 5V voltage power, but he likes to deliver less power when the terminal requests less. Possibly he also provides a little more than 2.1A, but calls to permanently more from it is either hot, delivers too little voltage for safe charging, or it will shut off easy.
But there is good air in the specs. My Sony Xperia Z1 Compact Mobile invites you to sample as measured with up to 2A, although the Sony original charger should be charged, according imprint only to 1.5A, but it delivers obviously a little more if he has to. It should thereby work hard pushed to its limits, accordingly, the original charger is also significantly warm, but he seems to bear that.
In general, the charger must be able to provide at least as much as the terminal can request a maximum. How much is it exactly stands somewhere in the technical description of the charger and the mobile phone - both can muster may by internet research somewhere. Too big you can not buy a charger. Can he deliver 5A, or 10, or 100, no matter the phone always gets his 2A from, and no longer. We only tried the charger is not pointless to buy big, because he then pointlessly expensive, useless bulky, and also (to a limited extent) pointless lower efficiency works.
One can consider when purchasing a second charger of course always based on the original charger, said - see my Sony example - can also backfire. The Sony charger may be tolerant and can also supply 2A instead of 1.5A, without being damaged, if the electronics of a cheap 1.5A charger from China that also looks so - and I would prefer not to bet. In airline sector it is more common, with large numbers to cast, and the China-appliances deliver real rather something less than it says. In contrast - in order to keep the low price - even arrange expendable components, such as an overload protection saved overloaded to the charger permanently, it can be destroyed. The Mumbi is just really good busy at Sony with 2A, and therefore he also works as it should, it loads reliably without being warm.
The compatibility of a foreign-loader with terminals is otherwise more a matter of the terminal. Not either, or the terminal gets only one of the USB 2.0 standard entsprechnenden charging current of - There are also tablets and smartphones which are notorious, that they want to cooperate only with the original charger, you put a universal charger to upload - despite nominally matching data 0.5A from, demenstsprechend long does it take to recharge. One uses as the unit during charging excessively (eg play the video), it may happen that the battery is not full but continued to empty the contrary - albeit more slowly as no infected handlers.
Older devices may not charge the USB connector to the existing USB connector is only used for data exchange.
I have long overlooked another influence: the USB cable. Standards-compliant USB 2.0 cables have to 500mA can deliver the device (USB 3.0: 900mA), so you can inside the wafer-thin 28 AWG cables (American Wire Gauge - small numbers mean thicker cables - a measurement system for cable thicknesses) use. Pumping now 4 times more power into the same cable, will cause a significant voltage drop of nearly 1 V, which is fatal if a priori only 5V at its disposal. Assuming, however, the next thicker cables (24 AWG), the voltage drop remains well below 1/10 Volt, is therefore negligible. Here stands at barely a USB cable in how it is structured internally, every now and then I found, however, the terms 28 / 24AWG in the data sheets, so 28AWG for data and 24AWG for power lines, with such cables can also 2A bring the charger to the device Mumbi. The resistance increases linearly with the way the cable length, with very short cables of some 10 cm length, one may make do therefore also with a 28AWG cable, the effect will be worse the longer the cable is. With the naked eye can see the difference (less than 3/10 mm) between 28 AWG and 24 AWG cables not, and if the rule of thumb "thicker = better" be like once before bypasses the less reputable manufacturers simply do what they have done before : they make the plastic coat thicker. Conclusion: you spend the night with the purchase of a suitable cable, ensure that it creates 2A without voltage loss (evidence would be that it is considered "fast charging", "resistant to high current" or "24 AWG" is referred to), or you can take hold just any, but overloaded then if it does not work, blame not the loader to.
By trying so to get - if you do not know the characteristics of its devices - not always too far. What in a particular combination of charger, cable and terminal just works, has in another combination not work as well, you stick better to the specs of the device instead of trusting the fact that it "somehow works" already just because of the plug fits.
The Mumbi is serving over 2A charge current I think a good position, he can thus probably invite pretty much everything floating around on mobile phones and tablets on the market - like exceptions prove the rule :-)