I'm not trying to be 'right', If you want to pay £20 for a charger that costs £9 inc p&p and you believe that benefits you, then that's ok.

DX sells thousands of these chargers and I've searched for reports of failure but can't find any, I'm using one, so are several of my friends and I know a lot of people on here are using them as well - I would never knowingly make a poor recommendation.

Take the reports of high voltages with a pinch of salt, most of them are people measuring the no load voltage of the charger - which is about as entirely irrelevant as it is possible for anything to ever be.

Considering that DX sells worldwide and are not the only retailer, the voltage measurers can't compromise more than 0.001% of total sales - and they are only casting aspersions anyway.

The only real test would be to have a WF-139 and a 'better' charger alongside each other and to put a large number of batteries through each, a lot of times and then to measure the end capacity of each battery.

Bearing in mind the number of times a battery gets charged a year, if you aren't charging daily it could be 3, 4 or 5 years before a drop of even 10% of capacity occurs (if it ever did - which I doubt).

Is this such a huge issue on a $5 battery ?

In any case, nothing has been proved, only alleged.

The testing I've seen that has been presented as 'evidence' is mostly to a poor standard and several important relevent facts seem to have frequently been ignored.

I've been criticised for joking about the validity of the 'testing' but as the problem is pure conjecture I really believe my point is valid. Unless a significant number of WF-139 failures are suddenly reported, this paranoia is about as sensible as being scared of the dark.