Top critical review
A Very Useful Device - With Reservations
on 23 April 2014
A year or so ago Qi wireless chargers cost a lot more than this and there were fewer around. The market seems to have matured as more devices implement the technology. The manufacturer here, Smart Technology, offer quite a range and this model seems to be their cheapest.
Having said that it doesn't seem cheaply built. The disk is small, just as you can see in the photo of it being held in a hand, and about a centimetre thick. There are blue circles top and bottom and these are rubberised to help grip the desktop and device, but not adhesive. You can dislodge the set up with a careless nudge. However this has not been a problem in use. It comes packaged simply with two USB to Micro USB cables - one short and one long. Both of good quality. You do need your own mains power supply and I used a general-purpose 2.1A USB charger.
The instructions are slightly awry. There is no Blue LED. When powered up in stand-by mode the LED glows dull red. Once you place a device on top of it to be charged the LED changes to blinking green for the duration. If I had any gripe I would suggest the designers programmed-in a change to steady green once the device is charged. Nothing serious but it would be helpful. My Nexus 5 went from half-full to fully-charged in less than two hours. Once removed from the disk the LED returns to standby and dull red.
The charger and phone got only slightly warm when charging from half to fully-charged. I doubt that in reality this is any warmer than a phone would become close to the body, in a jeans pocket for example. HOWEVER when I charged my phone from almost flat it did indeed become way too hot as it approached 92%. So much so that I whipped it away and placed the phone on a cold surface to dissipate the heat.
My original review ended on a very positive note but having experienced the heat others have previously mentioned I am more worried now.
It is hard to know whether this is caused by the general wireless charging process itself, a badly designed gadget or the result of placing the phone not quite centrally on the plate. The only way to ascertain the quality is to buy the official Google Nexus charger but I don't feel like taking the risk.
To sum up, I will use this charger to "top up" my phone and stick to the cable for full charges.