I am currently in the middle of a project and I am quite unsure of what type of battery and battery charger I should be using. To be honest I have never worked with battery or battery charger yet.
In this project, I have a 3.3V and 50 uA power source, which is extremely low. Also, this power source is not regulated at 3.3V, so I need some way to stabilize it. Currently, my whole project does work at 30 uA, but I'd like to be able to store some of the power source into some kind of battery. From what I have seen however, this seems to be very difficult as battery requires high current to be charged effectively.
I have currently found an ultra low power energy harvester and battery charger that does seems to satisfy my criteria, but I am very unsure of what battery to use. https://www.st.com/resource/en/datasheet/spv1050.pdf .
Also, about this energy harvester, is it possible to directly take an unregulated power source and plug it directly into the circuit (bypassing the battery) to power on my project?
So if someone with more experience than me could give me his/her input on what type of battery I should use and if it is possible, I'd be very glad to hear it. I am also taker of goods resources to learn on the subject as it is not very well explained in datasheets.
Thanks in advance.