Chapter 1
Control charging of the battery, with practically no overcharging, to ensure a long cycle life of the battery.
Monitor the discharge of the battery to prevent damage inflicted on the battery by interrupting the discharge current when the battery is empty.
Keep track of the battery’s SoC and use the determined value to control charging and discharging of the battery and signal the value to the user of the portable device.
Power the load with a minimum supply voltage, irrespective of the battery voltage, using DC/DC conversion to achieve a longer run time of the portable device.