Batteries, the life blood of an EC unit. Yes, the customer has batteries that need replaced.Unfortunately as an outside contractor I can not make the customer do anything. Back to the subject-no i have not tested and recorded unloaded vs loaded battery voltages (that will now be a part of the repair and documentation process). Yes it is possible that this is part of the problem. I have 14 units of this model, they are divided into two groups. One group has designated units, batteries and chargers. In this group the following CCM failures have been experienced: 6 units total
1 unit 0 CCM failures
2 units 1 CCM failure
1 unit 2 CCM failures
1 unit 3 CCM failures
1 unit 7 CCM failures
All of these units are 4 years old as are the batteries and chargers.
The next group uses batteries from the random customer pool (possible battery condition)
5 units 0 CCM failures
1 unit 1 CCM failure
1 unit 6 CCM failures
1 unit 7 CCM failures
Please note that the 5 units with no CCM failures are from a seperate S/N group than all of the other units listed,