User Manual

23
Yuasa Digital Powersports
Battery Tester
The previous battery testing methods required the battery to be
fully charged before testing. Yuasa’s Digital Powersports Battery
Tester (part number YUA
00BTY01) can test a battery, in or out of
the vehicle even if the battery is discharged. The tester measures
a battery’s internal resistance regardless of its state-of-charge.
Internal resistance is an indication of a battery’s ability to
deliver current, or amperage. The more capacity a battery has to
produce current, the lower its internal resistance.
Yuasa’s digital tester uses single load dynamic resistance
technology to calculate battery performance. A modifi ed DC
load is momentary applied to the battery while measuring
the instantaneous voltage drop across all cells. The load
is then removed and voltage across the cells is measured
again after a recovery period. These analog
measurements are converted into digital
information—the tester calculates the
dynamic internal resistance in order to
evaluate overall battery condition. The
entire process takes about two seconds and
current drain on the battery is minimized.
The tester provides information on open
circuit voltage, state-of-charge and battery
health and condition. This tester can also
test a partially charged or fully discharged
battery on or off a vehicle.
To use the tester:
1. Connect it directly to the battery
terminals. When the connection is
made battery voltage will be displayed.
2. Program what type of battery you are
testing. There are three selections—
VRLA/MF/AGM/SLA (valve regulated lead acid/
maintenance free/absorbed glass mat (AGM)
lead acid) or SLI (starting, lighting and
ignition) and Conventional batteries.
3. “SET CAPACITY” is displayed and
arrow keys are used to select the
amp hour rating of the battery
being tested.
4. Press the “ENTER” button to begin testing. In less than
two seconds the open circuit voltage is displayed with
test results that include: Good & Pass, Good & Recharge,
Recharge & Retest, Bad & Replace and Bad Cell & Replace.
5. After testing, pressing the up/down arrow keys displays
State-of-Charge and Battery Health, both listed as a
percentage.
Battery Maintenance
AGM Batteries. AGM batteries do not have to be checked as often
as Conventional batteries—about every three months, or three
months from the date of battery activation at the factory if stored
at room temperature. Higher storage temperatures cause faster self-
discharge and and requires that batteries be checked more often.
The battery will last longer if it is
100% charged most of the time
and any of the Yuasa automatic chargers will maintain a battery for
optimum performance and long service life. AGM batteries have
a predetermined quantity of electrolyte added at the factory or
in the fi eld specifi ed for the battery. Once activated, the battery is
permanently sealed and must never be opened. The addition of water
is never required for an AGM battery. The single most important
aspect to maintaining an AGM battery is to not let it
sit discharged for long periods of time—keep it
fully charged for peak performance.
Conventional Batteries. Conventional
batteries should be checked for state-
of-charge about once per month if not
used on a regular basis. Recharging
may be required if the vehicle is not
used for more than two weeks or if the
starter turns slower than usual when
starting the engine. A Conventional
battery requires the periodic addition
of distilled water when the electrolyte
level becomes low. Water loss is normal
in these batteries through the process
of electrolysis and evaporation. Low
electrolyte levels that expose the
lead plates to the air will result
in permanent damage to the
battery. Maintain the electrolyte
levels above the minimum fi ll
lines on the battery and at or
below the maximum line. Clean
terminals and connectors as
necessary and make sure the vent
tube is free of kinks or clogs. Always
replace fi ller caps and fi nger-tighten only.
Battery Storage
If the vehicle is in storage or used infrequently, disconnect
the battery cable to eliminate current drain from electrical
equipment. Check the battery every month (for Conventional
types) and every three months for AGM batteries. If open
circuit voltage indicates a low state-of-charge, charge the
battery. Temperatures below
60° F or above 80° F may
require more frequent inspections and/or charging.