Facebook
Google
GitHub
Linkedin
This circuit won't work for charging or discharging. Sadly, batteries can't be charged by putting them in parallel with a power supply (technically you could for some chemistries, but you would have to monitor the voltage and current carefully and adjust them as the battery charges, but it's much easier to have circuitry do it instead). The charging circuit you have set up would probably make the battery explode. Lithium based batteries (Lithium Ion and Lithium Polymer) charge to at most 4.2 to 4.4 volts. Charging them to a higher voltage would probably end badly. The second problem is that the voltage of a single lithium battery isn't enough to charge a USB device. They need 5 volts. I would suggest using a TP4056 circuit to charge the battery. They are dirt cheap and easy to use. I used one in an electric screwdriver I modified to use an 18650 instead of NiCD batteries and it works quite well. The TP4056 still pits out insufficient voltage for the USB, so I would suggest a 3.7 to 5 volt boost converter module. Many of them come with a USB port attached to make life simpler. Here are some links to the TP4056 and a boost converter module.
TP4056 module
https://www.amazon.com/Makerfocus-C...pID=517vcWLccGL&preST=_SY300_QL70_&dpSrc=srch
Boost module
https://www.amazon.com/DZS-Elec-2-5...pID=41PdQLizOXL&preST=_SY300_QL70_&dpSrc=srch
Here is a board that has both built into one. I haven't used this one, but I thought it might be good to mention it as well.
https://www.amazon.com/Onyehn-Lithi...sr=8-7&keywords=3.7+to+5+volt+boost+converter
Best of luck!
Thread is a year old. The OP only has 2 posts from a year ago. Your post is falling on deaf ears.
