Battery-charger controller
Atmel

Atmel AVR offers single-chip battery management products for Li-ion batteries. Designed to maximize lifetime and energy per cycle, they feature dedicated analog-to-digital converters tailored for battery fuel gauging and voltage monitoring.
Key Features

* Accuracy and safety High analog accuracy and excellent temperature stability enables the battery to deliver maximum energy, without risking damage or injury from overcharging or unsafe discharging.
* Gas gauging for control AVR combines hardware with proprietary software algorithms to deliver industry leading gas gauge accuracy, enabling utilization of the entire battery capacity without unplanned shut-downs.
* Intelligent authentication Atmel battery management devices support sophisticated authentication mechanisms to reject potentially unsafe copy batteries.