Compact low budget electronic cash register, intended to work in small retail objects – kiosks, pharmacies, offices, pavilions, small shops, restaurants and middle size shops as well. This electronic cash register with accumulator's power supply is possible to use like mobile device. When the power supply from network is not good, this cash register is possible to use simultaneously with accumulator connected to network power supply. Due to low consumption and good charge/recharge control of accumulator, the device guarantees reliability and excellent application characteristics.