battery charger

I'm installing a Redarc BCDC1250D to charge a 200AH LiFePO4 battery. One of the wires that needs to be connected is blue and needs to connect to an ignition source. This wire is used to tell the charger that the engine is running and it is safe to charge. I see in the threads that the...

Greetings, I purchased a 4A Viking battery charger/maintainer (Harbor Freight) and after 4 hours of charging did not see any change according to the charger's LED status. The charger was set to 12V AGM and was connected to the Neg/Pos posts.. I didn't have enough time to try moving the Neg...