Martel Electronics BetaGauge 3II - Manual (Page 175)

Battery Care/Maintenance A-10
The status of the quick charge battery pack charge cycle
is indicated by the LED indicator on the battery pack:
 Steady On indicates fast charging.
 Rapid Flash indicates charged.
 Slow Flash indicates discharging.
 Off indicates that the cycle is disabled or the
battery pack is not receiving power from the AC
adapter.
NOTE: The charger for the quick charge battery pack
is different from the standard charger. The two
should not be used interchangeably.
Intrinsically Safe Battery Pack
The intrinsically safe battery pack is designed for safe
use in hazardous areas where danger of explosion or
fire exists.
WARNING
Do not remove or charge an intrinsically safe battery
pack in a hazardous environment.
You can charge the battery pack while the pack is
installed or removed from the calibrator.
NOTE: Use the trickle charger to charge the
intrinsically safe battery pack.
Procedure
To charge the intrinsically safe battery pack, plug the
proper charger into the jack at the top of the battery
pack. A red LED indicator illuminates indicating that
power is available and the battery pack is charging.