I too have been seeing some problems with my G Watch, they appear to be related to the connector pins.



About a week ago I noticed that the watch had a tendency to restart when placed on or removed from the charging dock. I put the watch under magnification at work and saw that the contacts are either partially corroded or, in the case of two, pitted as well.



I have cleaned things up with some gentle cleaning and it seems to charge again and not restart. However my investigation has revealed some concerns beyond the fact that I don't expect a £160 device to do this within a couple of weeks of me receiving it.



I checked the iFixit teardown, from which I determined that of the 5 contacts, the one nearest the reset button is the ground contact. Checking the next 2 contacts with a Fluke multimeter, they both have 1.8V present during normal use, I didn't attempt to work out how much current they could sink or source but given that they could be immersed in ionised water or sweat (much the same thing actually) there is the opportunity for current to flow.



I checked the charging dock and found that the 5th pin has the 5V from the charger on it. I think it would be sensible to position the pogo pins on the dock at slightly different heights, that way you can control which pins contact first and ensure that the supply voltage is present before any data connection and also use this to enable the data pins so that they don't need to have a bias voltage applied during normal operation. I find the charging dock quite good but the magnetic aspect means that the watch will drag itself on to the dock even when not properly aligned, this might allow the pogo pins to short 2 adjacent contacts or even contact the wrong pins if offset by 1 contact in either direction. Again I think that the dock should be designed to align the body before any of the pogo pins contact the back of the watch.



Yes, it's a first generation product but this sort of thing is not difficult to get right and will have been known about ever since wearable devices with external contacts existed.



I am intending to get in contact with LG UK, I really like the watch, it works beautifully with my Nexus 5 but this sort of issue is not good.



One further thing, the contacts and pins should be hard gold flashed, gold being very inert. Now that 2 of the contacts on my watch are pitted and you can see the base metal through the plating (which looks gold in fact) this means the opportunity for the 1.8V bias voltage to create electrolytic action via skin/sweat is increased.



Comments folks?