BNC 835-3 User Manual - Manual (Page 39)

During operation, the approximate remaining battery capacity is indicated by the battery
symbol visible in the upper right corner of the display.
Figure 31 CW Display with Battery Symbol
Hints for maximizing the battery running time:
1. Fully charge the unit before use. For this, toggle the power switch to ON and
then OFF again while the 835-3 is powered by the external power adaptor. This
will initiate a new charge cycle.
2. Charging time of a completely discharged battery can be up to 6 hours.
The battery will only be charged when the 835-3 power switch is in the OFF
position.
3. Batteries should always be charged at room temperature. Charging the 835-3
at very low or at elevated temperatures may result in early termination of the
charging process, i.e the battery is not fully charged. For safety reasons, the
charging does not start when the internal temperature of the instrument is above
50 °C.
4. Check the battery indicator in the upper right corner of the display, it should
indicate full charge when running on battery power after charging (4 segments).
5. Power consumption of the 835-3 is reduced when the RF power is switched
off thereby increasing overall battery run time.
6. Battery run time is maximum for ambient temperature between 15 and 25 °C.
Self-discharge of the battery is much faster at temperatures above 30 °C.
7. Avoid storing the 835-3 in very hot places such as behind the windshield of a
car parked in the sun.
Hints for maximizing battery life expectancy:
1. The battery will reach its best performance after the first few charge-
discharge cycles.
2. Always use the external power adaptor supplied with the 835-3 for normal
operation and charging. This will make sure that the charging circuits work as
specified.
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