Emerson 2130 RBM Consultant Pro, Reference Manual

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2-13 General Maintenance
Note
The discharge cycle is intended for older versions of the laser heads,
powered by Nickel Cadmium (NiCad) batteries. This function is not
required for the current version of the laser heads, powered by Nickel
Metal Hydride (NiMH) batteries. However, use of this function on
laser heads with NiMH batteries will not result in any damage to the
heads or charger.
For maximum safety, the battery charger has a Pending status LED, which lights
momentarily when the head is first placed on the charger. If a battery is very low, or
is out of a specific temperature range, it cannot be safely charged. When this con-
dition occurs the Pending indicator remains illuminated. While Pending, the
charger is actually charging the batteries at a very low rate in an attempt to charge
the low battery to an acceptable voltage range. Once the battery temperature and
voltage are suitable for charging, the charger automatically begins trickle charging
and the Trickle indicator light turns on.
To fast charge or discharge the battery the Fast button or Discharge button must
be pressed. If the Fast button or Discharge button is pressed while the battery
voltage is too low or temperature is not suitable for Fast or Discharge operation, the
indicator light will flash on and off. This response acknowledges the request but
indicates that the charger cannot fulfill the request at that time. Once voltage and
temperature conditions are suitable, the requested Fast or Discharge operation will
begin and the indicator light will change to a steady light.
Caution!
Note that if the battery is fully charged, a user is able to initiate fast charge by
pressing the Fast button. After about 2 minutes, the charger will stop fast charge
in this case. However, to avoid overcharging batteries, you should not press the
Fast button with an already fully charged battery.