ADInstruments S7200 Operation Manual page 15

AD INSTRUMENTS S7200 TV Signal Analyzer Operation Manual
3 The charge indicator lights color is red, indicating that the battery is charging.
When the battery is fully charged, the charging indicator color is green.
The charging time for a fully depleted battery, is approximately four hours.
If the meter is power on, the charging time is longer.
CAUTION: In updating process, there must be a constant power supply to for at
least 60% battery power. If power fails during the updating process it can cause
damage to the instrument.
3