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Internal resistance of a battery

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Calculate the internal resistance of the battery.
Most of a battery’s internal resistance is due to solution resistance and contact resistance. To reduce solution resistance, increase the solution’s conductivity, increase the electrode area, and decrease the distance between electrodes. If reaction resistance is reduced too much, self-discharge may increase, potentially degrading storage performance.
Battery voltage E
V
Electromotive force (emf) of a battery
V
Battery load current I
A
Internal resistance R of a battery Ω

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