The Conrad 900006 is a 12V/24V Lead Acid Battery Activator. This activator will prevent the formation of sulphate deposits in new lead-acid batteries and reduces deposits in used lead-acid batteries to recover lost capacity.
Just connect the activator directly to the correct poles on your battery; no other power supply is required. The activator feeds back intermittent current peaks 80 to 200A to the battery, which eliminates any sulphate deposits. The activator can be left permanently connected as its current consumption of 4 to 7mA equates to just 10% of a battery's regular self discharge.