ProgressiveRC 208B iCharger - Manual (Page 24)

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iCharger Synchronous Balance Charger/Discharger 208B
Measuring internal resistance of the battery
In general, the internal resistance of a battery is not a fixed value. It varies over time as the battery loses
energy and also varies depending on the load, or how much current is drawn from the battery. One of the
urgent requirements of a battery is low internal resistance. Measured in milliohms, the internal resistance is
the gatekeeper that, to a large extent, determines the runtime. The lower the resistance, the less restriction
the battery encounters in delivering the needed power spikes.
The iCharger can not only measure the internal resistance of the battery pack, and also can measure the
per-cell internal resistance（only available for lithium battery）.
Note: You can check the internal resistance by Present testing information; see detail information in Page
8.
Start/Enter
>3 seconds
Batt type
Stop
1: 21 24 19m Ω
4: 18 26 16m Ω
Measure Internal
Resistance
Measure internal resistance. You can press Start/Enter for more than 3
seconds to start the process and stop at any time by pressing Batt
type/Stop.
The two lines show the first to the sixth cell‘s internal resistance, which is
only available for the lithium battery. Press Inc or Dec to display more
information of the seventh to the tenth cell‘s internal resistance. Press
Start/Enter to measure it again, and press Batt type/Stop to return to the
main menu.
The two lines show the seventh to the tenth cell‘s internal resistance,
which is only available for the lithium battery. Press Inc or Dec to
display the General Status information. Press Start/Enter to measure it
again, and press Batt type/Stop to return to the main menu.
Status display. This screen displays the battery pack internal resistance.
Press Inc or Dec to display the General Status information. Press
Start/Enter to measure it again, and press Batt type/Stop to return to the
main menu.
Battery Pack IR
173m Ω
Inc
Dec
Inc
Dec
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