I have a project that needs a lot of 1S lipo batteries (3.7V). It is becoming very difficult to charge these lipo batteries. I was looking for a charger that can charge 5 to 10 lipo batteries together safely but couldn't find any. The lipo battery that I am using is ADHBT-401. Please let me know if there is anything available in the market that I can use or if I want to design a circuit and manufacture it from a vendor, what are the things that I need to know.