The EPA1205 is a Four Stage Charge Stage 1:Desulfating the battery through 18V pulse,Charger enters this stage if it detects battery sulfation or severe discharger.Once battery is rejuvenated,charger moves to Bulk stage(LEDs:1 ON,2-4 OFF ) Stage 2: Bulk charge using charger highest rated current for the type of battery in use until it reaches 80% capacity. (LEDs:1-4 Blinking Sequentially) Stage 3: Absorption,the output voltage is limited to 14.7V while current delines as the battery charges to its full capacity without overheating(LEDs:1-3 ON,4 Blinking) Stage 4: Float,At this stage,the battery is fully charged and the charger maintains the battery through pulse charging.(LEDs:1-4 ON) How to use: 1.Connect the AC cord to the socket, The "power" LED (red) will light on solid. 2.Connect positive charger clip (red) to positive battery terminal, the black clip to negative, the "25%~100%" LEDs will light in asequence, If the battery polity is reversed or output is shorted, all LEDs will flashing simultaneously,DISCONNECT&CHECK 3.Depend on the charged capacity, 25%~100% LEDs will lights up solid,When all are ON,the battery is fully charged,you can disconnect the battery to use or kee it connected to charge in float mode.if battery stays at stage 2 after 24 hours of charging,then the battery is defective. The table shows the duration of the Bulk stepup to about 80% state of charge
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