A simple method of charging a battery from a higher voltage battery is shown in the circuit below to the left. Only one resistor is needed to set the desired charging current and is calculated by ...

For the PDF version of this article, click here. Far too often, the battery-charging system is given low priority, especially in cost-sensitive applications. However, the quality of the charging ...

Few components in portable system design have as pervasive an impact on the user’s experience with the product as the power source and the system used to charge it. The length of time the battery ...

I designed a compact, standalone Li-ion battery charger that is simple to build, extremely affordable, and easy to integrate directly into projects.