A feature that monitors the voltage on a battery and indicates when the battery is low. It is usually implemented using a comparator to compare the battery voltage to a specified level. May also include functions such as charging, remaining capacity estimation, safety monitoring, unique ID, temperature measurement, and nonvolatile (NV) parametric s [..]

 Battery monitoring and protection system that incorporates software to calculate the real available backup time, predicts when batteries need replacement and acts as a protection system against excessive discharges.