From The Free On-line Dictionary of Computing (19 January 2023):
Smart Battery Data
SBD
<hardware, protocol> (SBD) A method to monitor a rechargeable
battery pack, initiated by Duracell and Intel. An special
IC in the battery pack monitors the battery and reports
information to the SMBus. This information might include:
type, model number, manufacturer, characteristics, discharge
rate, predicted remaining capacity, almost-discharged alarm so
that the PC can shut down gracefully; temperature and voltage
to provide safe fast-charging.
Smart Battery System Implementers Forum
(http://sbs-forum.org/).
(1999-08-08)