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press the ENTER button over and over do not be alarmed if the value changes. This in mind you
should allow the battery to sit/stabilize for at least a 10-20 seconds before making more than a single
check of the IR. And in the
event that the charger ever seems to ‘stick’ during the IR measurement
process without giving the IR measurement after ~60 seconds, please disconnect the battery and
power the charger down immediately.
To Measure Individual Cell Internal Resistance
You can also check the IR of individual cells in LiPo/LiIon/LiFe batteries when the balance connector
is connected to the balance connector adapter board. To check individual cell IR, when on the
Battery.IR screen/menu simply press the + button once to view the Cell IR screen/menu. Then, press
the ENTER button once and after a relatively quick check the charger will display the approximate IR
of each cell in the battery. Again, these values are not absolute and will vary per the variables
previously noted, however, the can still be a valuable reference. Also, if you continue to press the
ENTER button over and over do not be alarmed if the values change. This in mind you should allow
the battery to sit/stabilize for at least 10-20 seconds before making more than a single check of the
cell IR.
And in the event that the charger ever seems to ‘stick’ during the IR measurement process
without giving the IR measurement after ~60 seconds, please disconnect the battery and power the
charger down immediately.
Another important consideration is that because the IR of the individual cells is being checked through
the balance connectors versus the main power/charge leads used to check the battery IR, the IR
values of the individual cells will not always add up to the IR value of the battery. And in some cases
variations in the IR values between cells can be attributed more so to their connection to the balancer
connector adapter board than the actual condition of the cells. Therefore, as long as the values do
not differ greatly (more than ~10-40%) and the battery is remaining relatively well balanced during
charge processes, the cells are still likely relatively close in actual resistance. However, significant
variations (for example, a cell that measures 200% higher in IR than other cells in the same battery)
that cannot be attributed to the connections can indicate a cell that is indeed higher in resistance than
others as a result of poor matching, physical damage, defect, etc. Typically such a cell would have
issues balancing during the charge process and/or exhibit physical abnormalities not found on the
other cell(s). Be sure to monitor any such cell/battery very closely during charge/discharge and/or to
remove it from service completely.
Charge/Discharge Mode Data
If you recently completed a charge/discharge process, and before the next process begins, the total
elapsed duration of the process, the capacity that was charged into/discharged from the battery, and
the end voltage of the battery will be displayed.
Cycle Charge/Discharge Capacity Data
If you recently completed a charge/discharge cycling process, and before the next process begins, the
cycle number for the last completed cycle (1-15) will be shown in addition to the CHG CAP/DCHG
CAP (Charge and Discharge Capacity) values.
Peak Voltage and Discharge Average Voltage Data
After completing a charge/discharge/cycling process, and before the next process begins, you can
view the peak voltage the battery reached through the duration of the charge process and/or the
average voltage of the battery during the discharge process.
