Powerstar batteries have an excellent charge acceptance and recovery capability even after deep discharge. The heavy-duty lead calcium-alloy grids in PowerStar batteries provide an extra margin of performance and service life in both float and cyclic applications, even in conditions of deep discharge.
During the expected floating service life of Powerstar batteries, there is no need to check the specific gravity of the electrolyte or add water, which means they require no maintenance service.
In fact, there is no provision for these maintenance functions.
High Recovery Capability Maintenance Free