The EC (Embedded Controller) firmware version 1.22 or later for FC-6000 Windows (or the latest EC firmware on FC-6000 Android) can better detect if the cells in a battery pack have been over-discharged or are unbalanced. If these battery conditions exist, it no longer allows that battery to be shown and used (which could have potentially caused further issues/risks with the battery). With prior versions, such a battery may appear to not charge to full or to deplete rapidly.
This means that on FC-6000 units, the description Battery 1: Not shown as recognized may appear in the battery details if a battery pack has been over-discharged or is unbalanced. To explore potential causes, see power troubleshooting on FC-6000 power and battery troubleshooting.
If everything in the power troubleshooting article has been corrected/validated, and a battery has been over-discharged (and is no longer being shown), do the following:
- Perform a full Power Off or Shut Down (such as in Windows under the Start > Power menu) and wait for the screen and then even the red light to go out.
- Leave the unit plugged in overnight to potentially recover the battery.
If the battery cannot be recovered in the unit, and other batteries work in this unit, the battery can be submitted to a Topcon dealer for service evaluation, repair, or replacement. If it is found that the battery has unbalanced cells which cannot be recovered, and it is still within the 90-day warranty plus reseller stock period (which is usually an additional 3 months), then the costs for replacement may be covered.