I use my 60 cx on a KLR and a KTM 450 (both thumpers). I probably put 6-8k miles a year on it and nearly all offroad. I have had my 60cx fail a couple of times where it would act like it was losing power - both external and battery.
I fixed it both times by taking it apart. For the battery there are two springy contacts that transmit power from the battery to the main board. I cleaned the contacts and bent them up a little and put dielectric grease on them.
For the external power I cleaned the connector contacts and put dielectric grease in them.
Maybe this is what Hair is talking about.