I have AW 123's, and the WF 139 charger.
The charger at first was great, now it seems that the left channel light does as it wishes, and the right one doesn't show charged now even though it is.
With all this I wouldn't buy another, but it is still charging correctly, I'm buying a PILA one.
I have 2 x cheapo chargers that are still working perfect, so may not even bother.
JUst be aware that the WF 139 does NOT as std charge 123's without a spacer, and that the terminals that are the right size across the two 18650 lanes are not wired up, this is easy to fix however, and a link is provided on DX on how to do this just with a few bits of wire and simple soldering.
I have ultrafire/surefire wama plus various unbranded cells in 123, but the AW 123 is light years ahead in performance terms, I charged all my batteries in pairs on the same charger, then compared them all, despite being(on paper) the same etc the AW were brighter, in 123 and 18650 size.
tabetha