The possibilities of using lithium-ion batteries assembled with series of connected cascades are considered. Main features of functioning of active and passive balancers that equalize voltage on cascades of assembly are reviewed. Since cost of an active balancer increases with number of cascades, an idea of developing a monitoring system based on cheap microcontrollers is proposed. The goal of the work is to study possibilities of using cheap microcontrollers in creation of battery assembly monitoring systems. Usage of microcontrollers also makes it possible to develop an effective system for balancing cascades. To reach this goal it is necessary to perform following tasks: to analyze possibilities of balancing of accumulators with different approaches, to propose ways of remote monitoring of accumulator parameters with usage of low-cost microcontrollers, and to provide the practical example of implementation of remote monitoring system of accumulator parameters. The idea of the proposed solutions is to use a conventional microcontroller and a set of lines according to the number of stages, as well as the ability to control voltage by using resistors and proportional voltage division on high-resistance resistors to obtain a voltage in range acceptable for input of such a microcontroller.