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To Measure Individual Cell Internal Resistance
You can also check the IR of individual cells in LiPo/LiIon/LiFe batteries when the balance connected
is connected to the balance connector adapter board/balancer. 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 any other battery connected to the other port) and power the charger down immediately.
Other important considerations include that because the IR of the individual cells is being checked
through the balance connectors versus the main power/charge leads used to check (complete) 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/balancer than the actual condition of the cells. This in mind, 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 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.
Individual Cell Voltage Data (for LiPo/LiIon/LiFe Batteries)
You can view the individual cell voltage data for LiPo/LiIon/LiFe batteries at any time
after/between/before a charge/discharge process by connecting the balance connector to the balance
connector board (which must also be connected to the balancer/charger) and scrolling to the
appropriate screen. The voltages shown are for the individual cells at that moment, with cells 1-4 on
