Humminbird VHF55S Operation Manual page 10

1a. If you are going to use alkaline batteries, remove the alkaline battery compartment cover
and install 6 AA alkaline batteries. Re-install the cover to the battery compartment, then
secure in place.
1b. If you are going to use the Ni-MH re-chargeable battery pack, make sure that it is fully
charged before trying to operate the radio. You can either charge the battery pack when
it is attached to the radio or when it is not yet attached. To charge the Ni-MH battery pack,
place it in the desktop charging cradle and plug either the AC or DC charger into the
cradle, depending on the power source that you plan to use. You will know that the battery
pack is seated correctly in the charger when the charging indicator LED lights up. You
should charge the battery pack for 14-15 hours. Attach the battery pack to the radio when
it is finished charging if you have not already done so.
CAUTION: The battery pack will continue to charge as long as it is in the charger and the
charger is connected to a power source, so you must remember to take the radio/battery pack
out of the charger when it has been fully charged. Overcharging batteries may result in damage
to both the battery pack and radio.
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