I'm trying to experiment with supplementing battery power using microbial fuel cells. MFCs are batteries that produce their charge from decaying matter, but they often only get up to 0.9v (unless youre an electrical wizard, in which they can go to 6v). I have an Arduino, while it is off Id like to switch to charging the battery with this MFC. The issue is its going to be low amp (I havent measure it yet) and around 0.9v. Will charging it this low even do anything? Assuming the battery charge will be higher than the MFC.
I additionally thought maybe 3 or 4 in series could solve the problem, but one is the ideal scenario. If its not possible would anyone recommend using a supercap to relay the MFC charge instead?