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SL-125 Series 5-9NM+ LED Marine Lantern
Maintenance and Servicing
Designed to be virtually maintenance-free, the SL-125, SL-125-C, & SL-125-GPS require minimal
attention, though the following maintenance and servicing information is provided to help ensure the
life of your Sealite product.
1. Cleaning Lens- occasional cleaning of the light lens may be required. Using a cloth and warm
soapy water, wipe off any foreign matter before rinsing the lens with fresh water.
2. Cleaning Solar Panels- occasional cleaning of the solar panels may be required. Using a cloth
and warm soapy water, wipe off any foreign matter before rinsing the panels with fresh water (SL-
125-C models only).
3. Battery Check- inspection of batteries should be performed every three years (minimum) to ensure
that the charger, battery and ancillary electronics are functioning correctly. Using a voltage meter,
check that the battery voltage is at least 12 volts under 100mA load, and ensure all terminals are
clear of foreign matter (SL-125-C models only).
Replacing the Battery
The SL-125-C lanterns have a sealed battery compartment, which provides the user with the ability to
change the battery after years of operation.
1. Remove the bolt/lock securing the battery box lid, and open unit.
2. Inside the battery box is an internal battery container. To access the battery, remove the four
screws and lid of this internal container.
3. Remove old battery from container and disconnect all connecting wires. Discard battery in a safe
manner.
4. Connect the “Battery Negative (-)” wire to the negative terminal of the new battery, and the “Battery
Positive (+)” wire to the positive terminal of the new battery.
5. Connect the “Battery Positive (+)” and “Battery Negative (-)” wires from the Solar Regulator to the
battery.
6. Replace the internal battery container lid and screws making sure no wires are protruding.
7. Close the battery box lid and secure with bolt/lock. Light is now activated.
8. To test place dark cover (towel or jacket) on top of light to activate sensor, light will come on within
one minute.
Care must be taken to observe the polarity of each wire before they are connected.
To ensure waterproofing of the unit, make sure that no wires are protruding and that there is an
even seal.
Always discard old batteries in a safe manner.
