K-x with NiMH batteries:-
URL: http://www.youtube.com/watch?v=zLPKgoG76bw
The wonky battery indicator may surprise and scare you much! (But not me, as I predicted that in the beginning, long time ago! :->)
View also the same K-x unit with Lithium batteries, by the same tester:-
URL: http://www.youtube.com/watch?v=sBmLxdUlkW8
And, there is no problem!