BATTERY TENDER JR TROUBLESHOOTING CHECKLIST
REMEDY
1 No AC power available. Insure AC power is available.
2
Battery Tender JR clamps or rings
are hooked up incorrectly.
Reverse polarity of clamps.
3
The fuse is blown in the ring
terminal or alligator clip harness.
Replacement fuse: Bussman Blade Type:
ATC-3 to ATC-7.5. (3A to 7.5A)
4
Poor electrical contact.
See notes on cleaning electrical contacts.
5
Battery voltage is less than 3 volts. (A
12 volt battery may not recover from a
discharge this deep.)
Disconnect all loads from battery (or battery
from vehicle), then reattach Battery Tender JR.
Wait no more than 3 seconds for solid red light
.
1 Battery is already fully charged.
Disconnect the charger from the battery and
check the battery voltage with a voltmeter. It
battery voltage is at least 12.7 Volts, then it is
fully charged.
2 Battery may be defective. Have battery load tested.
3
Poor electrical contact.
See notes on cleaning electrical contacts.
1
The battery is large and takes a
long time to recharge.
Allow sufficient time for charge. See note
below.
2 Battery may be defective. Have battery load tested.
3
Excessive load is present on
battery during charge cycle.
Remove load from battery or battery from
vehicle.
1
Poor electrical contact.
See notes on cleaning electrical contacts.
2 Battery may be defective. Have battery load tested.
Note: Cleaning
Electrical
Contacts:
If the charger ring terminals, alligator clips, or quick-connect terminals are corroded or damaged or
not making full electrical contact, or the battery posts are corroded, then: Disconnect charger
cables from battery and clean the battery posts and the charger ring terminals, alligator clips,
and/or quick-connect terminals. A number of non-acidic chemical products are available. One of
the simplest to use is baking soda and water. Use needle-nose pliers to widen the quick-connect
male pin contact area.
If your charger still has abnormal symptoms after trying the recommended remedies listed above, call or
email Deltran Customer Service or Technical Support. Most of the troubles encountered when recharging
batteries are due to poor quality or improper electrical connections between the battery and the charger.
POSSIBLE CAUSE
Note: After the battery voltage reaches
14.4 volts, the Battery Tender JR will go
into the float / maintenance, storage mode.
The single LED turns
GREEN quickly at the
beginning of the charge
cycle.
Battery Tender JR will not
switch to storage charge.
The Red light seems to
stay on too long. The
green light "never" comes
on.
The charger light is on, but
not red or green.
Remember that
the charger, the
battery, and the
vehicle electrical
system must all be
connected and
functioning
properly.
SYMPTOM
No Indicator lights are lit.
NOTE: The BTJR must
be connected correctly to
both the AC power outlet
and the battery before the
single LED will come on
and turn RED indicating
that a normal charge cycle
has begun.
Positive Charge Current
Battery
Clips or Rings
Charge Current Return
NEG
Battery Tender JR
DMM
POS
Vehicle Electrical System
Deltran Customer Service:
Phone 386-736-7900 Email service@batterytender.com
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