Im trying to investigate in some solar charging. I tried a very simple setup as you can see attached.
4x1.2V (4.8V), 700mA
When measuring the cell alone without any circuit attached I get approx. 3.2V in the shade as well as approx. 15mA over the diode.
When I measure voltage directly at the battery its allways 0V. I left it an afternoon in the sun but its also 0V at the battery (with and without the circuit attached).
Is there something Im doing wrong here? Or does it just take ages to charge at that mA rate?
Thanks in advance!