6V powering board cum UPS

The board has charging circuit using LM317 which offers overcharging protection also. After that when the source will cut off and work of UPS will start. The battery will discharge and there is over discharging protection circuit which will cut off the power to load if the discharge rate is high. The specific voltage decided here is 6.2V. When two Li-ion batteries of normally 7.4V makes the mark of 6.2V, the load will be cut off. Therefore the battery will cut off when the battery voltage of each Li-ion battery is at 3.15 V approximately. LED is also there to provide visual indication whenever over discharging is detected. This protections are highly necessary in case of battery leak or high discharge rate. The circuit is created while keeping in mind wide selection of batteries which were 2 x 3.7V li-ion batteries. One can also use other batteries.