I have a 3.7v 100mA/h battery that i want to charge with a (very) small solar panel. The panel has an output of aprox 5V and at full sun, the current is about 1mA when charging the battery.
However i have my doubts that the battery is being correctly charger. The power that the battery outputs after a long charge with the panel seems much lower that the (theoretical) power the solar panel gives to the battery. I know that some power is lost during charge but even so…
Anyway my question is:
Is there a minimum current to charge a battery?