The IN2903000 24V 3 amp battery charger delivers 18~29.2V regulated charging voltage for 8 cell 24V pack. The 29.2V battery charger is a fully intelligent battery charger which communicates with the LiFePO4 battery to monitor cell voltage and charge status to optimize the performance and extend the life of the battery. The 29.2V charger is equipped with protective electronics that automatically shut down the charger when cells are fully charged or in case any faulty occurs. With the BFP protection, the 24V LiFePO4 charger is capable of preventing backflow of current into the charger from the battery. The following symptoms are incurred if the red light continuously flashes: - The battery voltage is detected too low the charging will not be commenced. - Reverse polarity connected or short circuited.