Battery computer, charge level indicator, battery monitoring, smart shunt How much residual charge does my on-board battery actually have left? Is the battery really full? Why is energy being drawn from the battery despite consumers being switched off? The VOTRONIC LCD Battery Computer S answers these questions to the exact percentage (%) and ampere-hour (Ah). At the push of a button, it provides comprehensive information about the current state of charge of the battery, the flowing battery currents and the voltage level of the battery.