Went out this morning to prep my boat for trip tomorrow. Plugged power cord to 4 bank charger and got nothing. No lights on charger and boat is completely dead. I run all lithium batteries. Its a 09 Ranger and its been at least 3 weeks since I had it out. Never had this problem before. Appreciate any help

Check powercord first to see if you have power

That was the first thing I checked.

I looked up a few things and so I went back out and unplugged the power cord and hooked a separate lithium charger to the starting battery and the bank charger fired up. I let it set for a minute and unhooked the single charger and plugged in the power cord. I am getting 1 red flashing light, 1 green light and 1 yellow light and like every 5 or so seconds a beeping noise. It is a 3 bank not 4. I don't know what the beeping sound is. Gonna check it this afternoon and hope everything is ok.

I don't have lithium batteries but I know my charger will not charge if batteries are below a certain voltage. When I had that happen to me it was only one battery low and that battery would not charge with on-board charger.

If its not up to snuff this evening read the voltages off each battery.

Something happened to get the batteries where they were when you first tried to charge them.
Were the batteries low three weeks ago after your last trip? If you charged the batteries before letting it sit of three weeks something pulled them all down.

What brand batteries and what charger are you using? Sound like batteries are in sleep mode but something might have triggered them to shut down.

Went back out this afternoon and everything dead again ( no lights or power on bank charger ). So starting to put separate charger on each battery and hopefully after fully charging each battery and reconnect bank charger that will work. Im unhooking all cables to each battery while charging them. I only have one separate lithium charger so gonna take a while. If anyone knows what else could be the issue please let me know. Thanks

I don’t know your situation, but I was having issues charging 2 different brands of lithiums on 2 different chargers. 113 degrees is the max they will charge- my boat building was getting over 120 degrees in the afternoons.

A GPS puck,livescope black box, and a on off switch on a ultrex foot pedal. Either one left on for 3 weeks will drain a battery dead.
Some lithium's have to be woke up I believe if they are below a certain percentage.

You need to use a wake up procedure if that is whats going. What charger and brand natteries are you using? need a lil more info to help ya out

my ionic 125 start went to zero due to me forgetting to shut off some parasitic power stuff, plugged in the mk pc and it brought it back to 100% overnight.

not sure if others may need a kick to get them recognized by a charger.

knowing what he has for battery brand and charger would help.

Well I went out this morning and the starting battery was fully charged off the separate charger. I hooked the cables back to it and got the same 3 lights off the bank charger. I hooked the seperate charger to one of the trolling batteries and the charger read green. I noticed my trolling motor lights lit up. The trolling motor switch was left on. I had to disconnect the cables to one of the trolling batteries and hook up the charger to kick start the battery. Once I did that I reconnected the cables and plugged the power cord to bank charger and got all 3 yellow lights. All in all I think it was a matter of giving the batteries a kick start. I want to thank everyone for their help and input. Now its time to see how long I can stay out fishing in this heat

FYI It is usually best to unplug your trolling motor when charging.....especially a digital trolling motor.....

The switch left on the trolling motor drained the troll batteries. What drained the cranking battery?
Do you have a livescope box or a GPS puck that is not switched?