Features: * Low self-discharge * Higher energy density * No memory effect * Battery charge management system (Balancer) * * LED capacity indicator * 40 V / 2.5 Ah * Weight: 710 g The management system for charging the battery (balancer) refers to an electronic circuit that ensures a uniform distribution of the electrical charge within a battery. This means that almost the entire capacity of a battery can be used & the temporal change of individual cells can be prevented by aging.