Great product that poses no problem even if it sometimes takes to be careful how you put them Wiimotes. Indeed, if the notches on the back are not well placed on the load terminal, handles will not charge. For this, you just have to see if the light turns well to blue (color indicating the load) after use.
I use it now for several years and no specific worries aside batteries that start to fade a little (nothing however worrying for normal use of x or y batteries).
