Battery Percent And Charge Time - Schumacher SSC-1500A Owner's Manual

dashes ("--") temporarily while the tester analyzes the battery.
13.9 NOTES FOR TESTING BATTERY %
have a temporarily high voltage due to what is known as "surface charge."
The voltage of such a battery will gradually drop during the period imme-
diately after the charging system is disengaged. Consequently, the tester
could display inconsistent values for such a battery. For a more accurate
reading, the surface charge should be removed by temporarily creating a
load on the battery, such as by turning on lights or other accessories.
The battery % ranges from 0 to 100.
The battery tester is only designed to test 12V batteries. Testing a device
with a rapidly changing voltage could yield unexpected or inaccurate
results.
14.

BATTERY PERCENT AND CHARGE TIME

This charger adjusts the charging time in order to charge the battery com-
pletely, efficiently and safely. The microprocessor automatically makes the
necessary decisions. However, this section includes guidelines that can be
used to estimate charging times.
The duration of the charging process depends on three factors:
14.1 Battery State
charged in less than a few hours. The same battery could take up to 10
hours if very weak. The battery state can be estimated by using the built-in
tester. The lower the reading, the longer charging will take.
14.2 Battery Rating
a lower rated battery under the same conditions. A battery is rated in
Ampere-Hours (AH), Reserve Capacity (RC) and Cold Cranking Amps
(CCA). The lower the rating, the faster the battery will charge.
14.3 Battery Size
MEDIUM and 15A LARGE batteries. The 2A SMALL rate is for charging
smaller batteries such as those used for motorcycles and garden trac-
tors. Such batteries should not be charged using the 10A MEDIUM or 15A
LARGE rates. The 10A MEDIUM and 15A LARGE are for charging larger
batteries. The charger charges at the selected charge rate and eventually
reduces the charge rate in a controlled manner. After the charging process
has started, the digital display can be used to determine charging prog-
ress by selecting the BATTERY % mode.
There are some important facts to keep in mind when charging a
battery:
14.4 When the display indicates 77% charged, the battery has been charged
enough to start most vehicles.
14.5 The battery % shown in tester mode is an estimate based on the battery
– If a battery has only been slightly discharged, it can be
– A higher rated battery will take longer to charge than
– This charger provides a charge rate for 2A SMALL, 10A
: A recently charged battery could
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