The BLS-12-A from Battery Power Solutions is for use with a battery bank that operates at 12 volts or on vehicles that are used frequently and have one or two batteries. Runs constantly to keep the battery in optimum condition. Can also be used for battery storage in conjunction with a float charger. Comes with eye rings for attachment to the battery clamp bolts.
BLS-12/24-B is a higher powered version of BLS-12-A. For use with a battery charger to rejuvenate unusable batteries. Works faster than BLS-12/24-A. Comes with plier type battery clips.
BLS-12/24-C is for use with systems using multiple batteries and on heavy trucks. Runs constantly to keep batteries in optimum condition. Comes with 5/16" lugs for attachment to the battery clamp bolts.
BLS-48-A is a 48 volt version for use with battery banks and battery powered vehicles that operate at 48 volts. Can be mounted on the vehicle to constantly keep the batteries in optimum condition or can be used in conjunction with a battery charger. Comes with 3/8" lugs for attachment to the battery terminals.
Battery Power Solution Desulfators 
The BLS-12-A from Battery Power Solutions is for use with a battery bank that operates at 12 volts or on vehicles that are used frequently and have one or two batteries. Runs constantly to keep the battery in optimum condition. Can also be used for battery storage in conjunction with a float charger. Comes with eye rings for attachment to the battery clamp bolts.