A battery separator for use in a flooded cell-type lead acid battery includes a separator that is wrapped around an electrode to form an enveloped electrode that is placed in a cell compartment having mud rests that separate mud deposited from the enveloped electrode so that the incidence of battery failure is minimized. The wind turbine may further include a yaw drive system for rotating the nacelle relative to the tower about a substantially vertical axis, andor a pitch drive system for rotating the blade of the rotor around a longitudinal axis of the blade. The vertical drive device includes wire guides having guide holes through which the wire electrode is passed. Simultaneously, the pumping chambers of a different portion of the pistons are fluidly connected to the outlet via a high pressure actuation fluid outlet passage. The redirected force of the piston causes the bearing and a connected clutch spring to move in a direction away from the friction clutch to disengage the clutch.