The Battery Sitter charger has a unique ability to desulfate and permanently recover batteries that have been neglected or deeply discharged. The charge retention test which follows this stage confirms whether the battery has been adequately recovered before the long term maintenance “floating charge mode cycle” engages. As part of this, the recovery continues with the subsequent unique charge & check stage which removes remaining sulfate crystals from the plates. The Battery Sitter’s unique automatic desulfation mode works like this: Once the Battery Sitter determines that the battery is sulfated it applies a voltage of up to about 20V at a controlled low current for a maximum period of 2 hours, to recover the battery to the extent that it can again accept a charge using the more normal charging algorithm. sulfated) VRLA / (including MF type) sealed batteries often develop internal resistance too high to overcome at normal charge voltages which requires an initial high voltage charge rate (up to 25V), under supervised conditions, to reverse the high internal resistance caused by sulfation on the plates. Usually one is told that the battery has died and needs replacing and that is how this myth is kept alive. Myth #2: Once sulfated, a battery is useless and should be replaced.īatteries develop a high resistance to charging which the average (so-called) smart charger cannot overcome. IMPORTANT: To effectively desulfate a battery it must be disconnected from the vehicle wiring before connecting to the Battery Sitter. Vehicle electronics require a higher voltage than this to function so if a battery in this condition is still connected to the vehicle no electronics can be active.Įven a LCD display circuit will draw a few milli-amperes if a voltage is applied and upon sensing this the Battery Sitter will engage its normal charge mode with maximum charge voltage 14.3V. Upon connection to a battery, the desulfation mode can only engage if no current enters the battery at a charge voltage of up to 14V.Ī sulfated battery’s voltage will initially be typically in the 2 to 6V range. Too good to be true? Find out more as we Myth Bust! Myth #1:The Battery Sitter’s high voltage desulfation mode can damage vehicle electronics if connected to an installed battery.įact #1: The Battery Sitter’s high voltage desulfation mode cannot engage if vehicle electronics / wiring are sensed. ![]() The Battery Sitter is one charger that can handle a wide range of batteries.
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