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NOTE: If charger detects more than 20 volts, the red FAIL light will illuminate and
the display will show 19.9. This may show on the display in BOOST CHARGE
mode.
c. Plug charger into outlet, and the battery test will automatically begin. Because the
test starts the instant the charger is plugged in, be sure to PLUG THE CHARGER IN
AS SOON AS POSSIBLE AFTER HOOKING CABLES TO BATTERY.
It is suggested that you stay near the charger for the rst 1 minutes or so to monitor test results.
If the battery FAILS, it is not recommended to attempt to continue charging a failed battery.
NOTE: To determine the difference between a BAD battery and one that fails simply
because it does not accept a charge, run another test with a dedicated battery tester.
The NAPA 85-8100 Digital Wheel Charger is not meant to replace a conductance battery
tester. Remove the battery from the charger for at least 4 hours before doing a
conductance test.
8.2 BATTERY CHARGE (See section 12 for more information)
Testing is part of the charging process. Once the initial 15-minute test has completed and the bat-
tery has passed, more time can be added to the Timer dial to nish charging.
NOTE: Even if the test is interrupted, the digital timer will keep track of all time that has passed
so the test can be picked up again at any time.
NOTE: Because the NAPA 85-8100 is a manual charger, charging will continue for as long as
the timer is active, even after the 15-minute digital test has completed. Extended charge times
can be potentially dangerous—so only set timer for slightly over 15 minutes.
Continue to charge until charge current drops to 12 amps or less, the target amp-hour value has
been reached, or the charge voltage exceeds 16 V.
Stop charging immediately if battery emits vapor or is hot (≥125 ˚F) to the touch.
9. FOLLOW THESE STEPS WHEN THE BATTERY IS INSTALLED IN THE VEHICLE. A
SPARK NEAR THE BATTERY MAY CAUSE A BATTERY EXPLOSION. TO REDUCE
THE RISK OF A SPARK NEAR THE BATTERY:
.1 Before working on vehicle, rmly apply emergency brake and place gear shift to NEUTRAL—shift
an automatic transmission to PARK.
9.2 Locate the NAPA Digital Wheel Charger as far away from battery as charger cords permit and
position AC and DC cords to avoid stepping on or tripping over them and to prevent damage by
hood, doors, or moving engine parts.
. Stay clear of fan blades, belts, pulleys, and any other parts that can cause physical injury.
9.4 Turn OFF all vehicle loads, including door lights, and correct any defects in car’s electrical system
that may have caused low battery.
9.5 Check polarity of battery posts. The POSITIVE (POS., P, +) post usually has a larger diameter
than the NEGATIVE (NEG., N,–) post.
9.6 Determine which post of battery is grounded (connected) to chassis. If negative post is grounded
(as in most vehicles), see paragraph 9.7. If positive post is grounded, see paragraph 9.8.
. For negative-grounded vehicle, rst connect POSITIVE (red) clamp from charger to POSITIVE
(POS., P, +) ungrounded post of battery. Then connect NEGATIVE (BLACK) clamp to vehicle
chassis or engine block away from battery. Do not connect clamp to carburetor, fuel lines, or