Monitoring battery SoC and SoH, such as amperes, volts, capacity; temperature, protection status and cell balance, cycle life times, event records etc.  

With circuitry of blocking back electromotive forces(BEMF), and filter circuitry against noises or interference.

Smart two-way cell balance design for both in charging and in quiescence.

LED display to show battery capacity, based on Coulomb Counter and, to show protection occurrences.