The number of mobile phone devices in India, a country having a population of about 1.252 billion is about one billion, and rising gradually, owing to rising economy and cheap mobile phones coming up each day. In such situations, the importance of developing efficient charging systems becomes exponentially high. This paper attempts to propose the model for an efficient automated microcontroller controlled battery charging system, that takes in the feedback from the device, by detecting the state of charge (SOC) of the battery, and then algorithmically detects the charging phase in which the charger has to charge the lithium ion battery. The model proposed is developed in MATLAB/Simulink, and an iterative procedure is followed to determine the closest voltage values for most efficient charging. Once these characteristics of batteries are detected, the statistics gathered will be used to model the circuit for fast charging of the battery using the algorithm developed.