Lithium- ion batteries are utilized everywhere from electronic equipment , smartphones and laptops to electric vehicles and power plants due to their high energy density, low weight and self-discharge characteristics. However, they inherit certain disadvantages including high cost, narrow temperature range operation and the need for a prime management system. Increased temperature caused by high current provided can damage the cells causing lithium deposition in the cathode or even vaporization of the electrolyte leading to internal short circuit. In this paper a compact and low-cost battery management system is presented. This system can measure the voltage and current for both the battery and supply via external sensors for both charging and discharging conditions. Two NTC thermistors, 10k and 100K Ohm each, are exploited for collecting battery temperature in two different spots of the socket for direct comparison and validation of the layout accuracy while an additional sensor measures external temperature and humidity. A charging socket is provided for charging the cell through an external source or a small PV panel with dynamic voltage output to test the battery response. Finally, an Arduino compatible device is implemented on one hand to protect the battery from overcharging and collect these values at a 10 second time rate and calculate precious parameters of the battery like state of charge, state of health and state of life, on the other hand to send data of battery over Wi-Fi on the internet application server for real time monitoring, in an efficient, portable and low-cost setup.