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The TK-669B can be powered from the following sources:
•
DC power from a USB power source, such as a computer.
•
AC power by adding a USB to AC adaptor (optional).
•
DC car charger by adding a USB to DC car adaptor (optional).
•
Solar power.
•
Hand crank power.
Best Practices for Charging
We recommend periodically charging the radio completely through the USB port (from your computer or
the optional AC adaptor or DC converter). You can also leave it connected to this power source all of the
time. This will insure a fully charged radio when you need it and the battery will last longer. The solar collec-
tor will not completely charge your unit and is intended to extend the existing battery charge.
DC and AC Power
Prior to using the TK-669B, we recommend you fully charge the rechargeable battery through the USB
Power Input (Figure 2). Lift the rubber tab on the back of the TK-669B to expose the connectors, as shown
in Figure 2. Connect the Power In Cable (not included) from the Power Input jack on the radio and the USB
Power source on your computer or optional AC or DC converter. The red battery charge indicator light will
illuminate when charging. Continue to charge the TK-669B for several hours or until the charging light turns
from red to green. The TK-669B is now ready for use.
Important Note: Use 5.0V USB power source (not included) (from a computer or appropriate AC or DC ad-
aptor). Over-voltage may result in damaging the TK-669B.
Solar Power
Place the TK-669B in direct (or indirect) sunlight with the solar panel facing upwards. NOTE: There is not
enough solar energy to turn on the red charging light. Thus, no red charging light will be present during
solar charging. NOTE: If the display heats up outside the operational range, the display will fade. NOTE: The
solar collector will not completely charge the TK-669B and is intended to extend the existing battery char-
ge. The solar collector efficiency is significantly impacted by direct vs. indirect sunlight, angle of the solar
collector, angle of the sun and weather conditions, including your latitude, time of year (winter vs. summer),
time of day, and cloud cover.
Hand Crank Power
•
Turn the hand crank either clockwise or counterclockwise at about two cranks per second for two
minutes to activate the internal battery for initial use, or when the unit has not been used for more
than 60 days. The red battery charging light illuminates when charging, as shown in Figure 1. After two
minutes of cranking at two revolutions per second, wait two minutes to begin cranking again. This will
extend the crank life.
•
For subsequent charges, turn the hand crank for one minute to produce 70 minutes of continuous light
for the LED flashlight, or 16-20 minutes of continuous radio usage (subject to volume) or approximately
3-5 minutes of talk time on the smart phone (your results may vary due to phone variation)
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Operation
Power sources
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