Measuring internal resistance of the battery
In general, the mtcrnal resistance of a battery 1s not a fixed value. It varies over ume as the ba11ery loses energy and also
varies depend mg on the load, or how much current is drawn from the banery. One of the urgent requirements of a battery
is low internal resistance. Measured m milhohms, the internal resistance is the gatekeeper that, to a large extent, determines
the runtime The lower the resistance, the less restriction the battery encounters m <lehvenng the needed power sp1kl.'S.
The charger can not only measure the internal resistance of the battery pack, and also can measure the per-cell internal
resistance (only available for l11h1um battery).
Measure Internal
Resistance
Batt type
1
Start/Enter
stop
>3 seconds
1: 21 24 19m0
4: 18 26 19mQ
Inc►
l
◄
Dec
Battery Pack IR
125mQ
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 Imes show the first to the sixth cell' s mtemal 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 mam menu.
StalUs display. This screen displays the battery pack internal resistance. Press
Inc ►or◄ Dec to display the General Status mformation. Press Start/Enter to
measure it again, and press
Batt type/Stop
to return to the main menu.
Note:
You can check the internal resistance by Present testing mformation;
20
