Linear and switching chargers — charge current and cell count.
Charger ICs regulate constant current then constant voltage for lithium cells. Set charge current with a programming resistor per the datasheet.
Safety
Follow the cell maker’s minimum and maximum voltage. Include thermistor inputs if the IC supports JEITA-style cutoff. This site does not cover pack assembly — consult standards for products you ship.
Widely used examples
Examples for orientation only. Not an offer, stock list, or complete parametric search.