Fully adjustable, the PC1600 is the ideal all-rounder for the home professional. Projecta 6 Stage chargers are designed to only supply power to the battery clips when they are connected correctly to a battery. This is to prevent sparks during connection to the battery or if connected incorrectly by mistake. This safety feature prevents the charger from being used as a Power Supply'. This is a fully automatic battery charger with 6 charge stages.Automatic charging protects your battery from being overcharged so you can leave the charger connected to the battery indefinitely. 6-stage charging is a sophisticated charging technique that gives your battery longer life and better performance compared to using traditional chargers. Projectas Pro-Charge chargers are suitable for most 12V automotive, marine and deep cycle batteries. They may also help restore drained and sulphated batteries. The 6 charge stages are: Rejuvenation; Soft Start; Bulk; Absorption; Battery Test and Float. The rejuvenation stage is manually initiated and delivers a 24 hour high frequency, intermittent charge that breaks down sulphation from the batterys plates. Upon completion, the charger will proceed to Soft Start. Soft Start is a preliminary charge process that gently introduces power to the battery, protecting the battery and increasing battery life. The Bulk stage reduces charging time by charging the battery at the maximum rate (constant current) to a set voltage, at which point the battery is approximately 80% charged. The absorption stage charges the battery to 100% by adjusting the charge rate allowing the battery to absorb more power. Designed especially for calcium batteries, this stage returns calcium batteries to full service by removing acid stratification of the electrolyte. The battery test stage is where the analysis mode tests the battery to ensure that it has taken the charge; if the battery passes the test the charger will proceed to the float stage. The Float stage maintains the battery at 100% charge without overcharging or damaging the battery. This means the charger can be left connected to the battery indefinitely. Ideal battery type: Starting / Calcium / Marine / Deep Cyle.