When the voltage stops rising, the battery is fully charged and the charger turns off. This DV/DT electronic timer determines full charge of the batteries by measuring the rate at which the battery voltage increases during charge. ![]() A patented electronic timer urns the charger on and off automatically. A ferroresonant transformer is used to provide a highly reliable, line-compensating unit with a minimum of moving parts, designed for long, trouble-free service. INTRODUCTION The Lestronic II automatic battery charger is designed to recharge deep-cycle, lead-acid batteries. Convection-cooled design for maximum reliability and minimum maintenance. Silicon diodes with inherent surge protection operated at a conservative percentage of their rating. Automatic decrease of charge rate for superior battery life through good equalization of cells and low water use rate. Supply voltage variation + 10% from nominal, + 1% maximum battery charger voltage variation, decreasing to + ½% at finish rate with constant electrolyte temperature. Compensates automatically for AC input line voltage variation by high reliability ferroresonant transformer design. Features Patented DV/DT electronic timer monitors battery state-of-charge while charging and automatically turns charger off as battery reaches full charge. IF YOU DO NOT FOLLOW THESE SAFETY INSTRUCTIONS, INJURY OR PROPERTY DAMAGE CAN OCCUR. IT MEANS: BECOME ALERT YOUR SAFETY IS INVOLVED. LOOK FOR THIS SYMBOL TO POINT OUT SAFETY PRECAUTIONS. DO NOT DISCARD THIS MANUAL AFTER READING. or longer output cord with polarized connector PLEASE SAVE THESE IMPORTANT SAFETY AND OPERATING INSTRUCTIONS For correct operation of the equipment, it is important to read and be familiar with this entire manual before installing and operating the charger. ![]() AC input cord with NEMA 5-15 grounded plug Output 8½ ft. 1 LESTRONIC II FULLY AUTOMATIC BATTERY CHARGER MODEL AC Input: DC Output: Connections: Specifications Volts AC, 12 Amp, 60 Hertz, single-phase 48 Volts DC, 21 amps Input 6 or 9 ft.
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