Charge The Battery; Charging - Laerdal Serres Guia Del Usuario

Charge the Battery

The internal rechargeable battery can be charged directly from external AC or DC power.
1. Ensure the Operating Knob is set to "0".
2. Connect either external AC or DC power to the LSU and charging will start
automatically.
3. During charging, the Battery Status Indicator will indicate approximate achieved
battery capacity. Minimum charging time for full charge is 4 hours.
A completely discharged battery cannot be charged by the LSU and must be replaced.
If LSU battery is kept on constant charge, perform device test at least once a month to
exercise battery.
Cautions
• Do not perform the Device Test during battery charging.
• The recommended ambient temperature for charging is from 15°C to 25°C.
• The battery will not be charged when the LSU is in operation.
Check the Battery Quality
If poor battery quality is suspected, charge the battery for a minimum of 4 hours and
then perform the following test. Do not connect to external power.
1. Run the Device Test.
2. Let the LSU operate continuously at 500+ mmHg setting and free air flow for
20 minutes.
3. If the LSU stops before completing the 20 minutes, the battery should be discarded.
Caution
Replace the battery when it does not pass the Battery Quality Check or after 3 years,
whichever comes first.
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Battery