Have a look here

http://www.sciencedirect.com/science/article/pii/S0960852408006494#

Despoina Pits thank q for sharing article....

can i just conect a multimeter, n thats fine enough for recording output....?

i mean, i cannot take Current and Voltage both at a time, what should i have to do to get Current and Voltage readings parallel, both at a time..... should i have to conect ammeter and voltameter saperate, even that wasnt accurate one.

when i switch from current to voltage, i ll get fluctuations in reading, is there any beter device that can solve this.

In fact, you have to use a known external resistance (ideally a variable one), acreoss which you measure the cell voltage. Then you simply apply Ohms law (R=U/I) to calculate the current from the voltage. Hence, you don't need two devices. 

The important point is allways to wait long enough  (to have a constant potential) before taking the values.

Bhim,.multimeter its depend on type of multimeter that you use. some multimeter consist both function, measure current and voltage.

for a better reading, i suggest to use the DC load in your experiment. it is more easier and accurate.