this post was submitted on 13 Dec 2025
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I know of one chip that is a sodium ion charger but I think it is only available in China and not in the west since the tech is picking up more speed there.
I guess you technically can use a Lithium ion charging chip with a programmable charge voltage like the BQ25300 but the problem is that almost every chip with a programmable charging voltage also has an under voltage shutoff to prevent deep Li-Ion discharge (usually 3, 2.5, or 2V), but that also means that you can only use like 50-80% of the already limited capacity.
One of my next projects is using GreenPak programmable signal matrix (like a very mini FPGA) to make a sodium charging chip I can put in projects.