FIELD: electrical engineering.
SUBSTANCE: accumulator power supply source for power-driven tool includes an accumulator, a monitoring circuit and a module for switchover to economy mode. The accumulator includes at least one accumulator cell. The monitoring circuit is controlled through receipt of power supply from the accumulator. The module for switchover to reduced energy consumption mode switches the accumulator power supply source over to reduced energy consumption mode by way of discontinuation of at least some or all of the monitoring circuit operations when the monitoring circuit reveals discharge completion condition wherein the accumulator discharge current is equal to or below the specific preset current value while the monitoring circuit additionally reveals at least one condition stable in terms of voltage wherein the accumulator cell voltage variation value stays within the pre-specified stable range of voltage variation values and a condition stable in terms of temperature wherein the value of the accumulator temperature vitiation stays within the pre-specified stable range of temperature variation values.
EFFECT: reduced consumption of energy.
16 cl, 6 dwg
