Increase battery life upto 5x. Provides greater charge acceptance. Batteries charge faster and last longer. No assembly required. 10 in. L x 8 in. W x 2 in. H (1 lbs.) PowerPulse is not a charger. Charging does not eliminate the main cause of premature battery failures energy-robbing sulfate deposits on battery plates. During this process, the plates gradually become more and more clogged with microscopic lead sulfate deposits. These deposits eventually limit the surface area available for energy transfer and cut back the battery"s ability to accept, store and release energy. PowerPulse generates an intermittent, optimized high frequency pulse that reduces existing sulfate deposits and keeps them from building up again. The patented pulse technology circuit dramatically improves your batteries ability to accept and keep a charge and extend your batteries life. This small, weatherproof product can be used as a supplement to your existing charging system. You do not need an electrical outlet because PowerPulse draws a small portion of the current from the battery. Accordingly, it should only be used on vehicles or equipment that is regularly used and frequently charged.