Battery Tender Junior 800 Mode D'emploi page 4

ATTENTION: The Battery Tender
FREE CIRCUITRY. The output alligator clips or ring terminals will
not spark when they are touched together. The Battery Tender
charger will not produce an output voltage until it senses at least 3
volts from the battery. It must be connected to a battery with the
correct polarity before it will start charging a battery. Therefore, if
you plug the AC power cord into an AC power outlet, and if the
output alligator clips or ring terminals are not connected to a
battery, and if you touch the alligator clips or ring terminals
together, there will be no electrical spark.
THE OUTPUT CLIPS OR RING TERMINALS MUST BE CONNECTED TO
A BATTERY BEFORE THE CHARGER CAN PRODUCE AN OUTPUT
VOLTAGE.
WORKING WITH A DEAD BATTERY OR A BATTERY WITH A
VERY LOW VOLTAGE:
If you try to charge a dead battery having a voltage below 3 Volts,
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the Battery Tender charger will not start. An internal safety circuit
prevents the charger from generating any output voltage unless it
senses at least 3 Volts at the charger output. In this situation, the
amber LED will continue to flash, indicating that a charge has not
been initiated.
If a 12 Volt, Lead-Acid battery has an output voltage of less than 9
volts when it is at rest, when it is neither being charged nor
supplying electrical current to an external load, there is a good
chance that the battery is defective. As a frame of reference, a fully
charged 12-Volt, Lead-Acid battery will have a rest-state, no-load
voltage of approximately 12.9 volts. A fully discharged 12-Volt,
Lead-Acid battery will have a rest-state, no-load voltage of
approximately 11.4 volts. That means that a voltage change of only
1.5 volts represents the full range of charge 0% to 100% on a 12-
Volt, Lead-Acid battery. Depending on the manufacturer, and the
age of the battery, the specific voltages will vary by a few tenths of
a volt, but the 1.5-volt range will still be a good indicator of the
battery charge %.
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CHARGER HAS A SPARK
NOTE:
NOTE:
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STATUS INDICATING LIGHT: If the light is not lit, then the
battery is not properly connected and/or the charger is not
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plugged into AC power. The following describes light operation:

AMBER LIGHT FLASHING – The charging/maintenance
amber LED flashing indicates that the battery charger has
AC power available and that the microprocessor is
functioning properly. If the amber LED continues to flash,
then either the battery voltage is too low (less than 3 volts)
or the output alligator clips or ring terminals are not
connected correctly or reverse polarity connection to
battery.

AMBER LIGHT ON STEADY (Amber LED 1) – Whenever
the amber LED is on steady, a battery is connected
properly and the charger is charging the battery. The amber
LED will remain on until the charger completes the charging
stage.

GREEN LIGHT FLASHING (Green LED 1) – When the
green LED is flashing the battery is greater than 80%
charged and may be removed from the charger and used if
necessary. Whenever possible, leave the battery on charge
until the green light is solid.

GREEN LIGHT ON STEADY (Green LED 1) – When the
green LED burns steady, the charge is complete and the
battery can be returned to service if necessary. It can also
stay connected to maintain the battery for an indefinite
period of time.
Note:
See page 5 for the Lithium Iron Phosphate (LiFePO4)
recovery mode light sequence.
TIME REQUIRED TO CHARGE A BATTERY:
The Battery Tender
hour. Therefore, a fully discharged 15 Amp-Hour battery will take
approximately 15 hours to recharge to 80% capacity.
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charges at a rate of 800mA, or 0.80A per
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