[AdiDex]

i have a question how current varies with concentration ??
Until unless we don't know the Kinetics of cell ?? it can be zero order too !!
i think Current should depend upon internal and external resistance otherwise we can't able to handle our gadgets with any other source of power having same Potential difference but having different concentration Eg. take example of portable charger and Home charger.

[Borek]

how current

What current?

[AdiDex]

Sorry its my fault , its ELECTRIC current .
electric current flowing through cathodic compartment to anodic compartment .

[Borek]

Current doesn't flow without a reason. Do you mean current forced on electrolytic cell, or current in a loaded galvanic cell?

If I guess correctly what your question is, in both cases it is in general I=U/R, but it may happen there are some limitations due to kinetics.

I don't see what are concentration differences between home and portable chargers. Both are typically mains appliances.