What is SMBus(System Management Bus) Digital Circuit?
Li-Ion laptop batteries are not simple devices. All Li-Ion laptop batteries have cell protection circuits and most of them have charge indicators. We call it a “Smart Battery.” These are laptop batteries with state-of-charge-indicators. System Management Bus (SMBus) circuits consist of state-of-charge indication and cell protection. This circuit board communicates with the laptop and provides the remaining capacity, output voltage, and temperature information. Some Ni-Mh laptop batteries are “Smart Batteries”.
