On Board Battery Charger Blinking Green Lights - Meaning?

[Ozark10]

I'm getting my Ranger ready for the water and did some battery maintenance by topping up the water levels. When I plugged the charger back in it is blinking green on the 100% LED on all four batteries. I'm used to seeing solid green when batteries are on full charge. What do the blinking lights mean?

Thanks!

[Yeti Guy]

I would say batteries are fully charged, but charger is providing a float charge or sometimes called maintenance mode. If it's a Minn Kota charger this maintenance mode last for 24hrs and then you should see the solid green lights.

[BrownTrout]

Did this occur immediately after you plugged it in or after it had been charging the batteries for awhile?

[Ka'King]

Mine does that before they go solid green...just leave them sit for a little longer and you'll get solid lights. I think it designates a different voltage the batteries are receiving over your red count lights.

[cwilt]

I would say batteries are fully charged, but charger is providing a float charge or sometimes called maintenance mode. If it's a Minn Kota charger this maintenance mode last for 24hrs and then you should see the solid green lights.

this.

[Ozark10]

I had charged them overnight. One battery was blinking red so I took my dealer's advice and charged it separately on a different charger. Then I topped them all off with distilled water. When I plugged the on board charger back in they started the blinking green thing. I'm not sure I've ever paid this much attention to the light patterns. Normally when I finish fishing I just plug the charger in. When I look again all the lights are solid green. This is the first time I've seen them blink green. Also, because it's quiet in my garage where the boat is I heard a bubbling noise when the on board charger was plugged in. I wondered if the blinking was some indication of overcharge. Is there such a thing as overcharge?

[joebw]

On mine, it means that they are 90% charged. Solid green when they are 100% charged........ I think

[besnyde]

The battery charger that came with my boat (with Ranger logo on it) will charge and then go to blinking green before going to solid green. After a while on solid, they go to blinking green again and back to solid. I always assumed this was the trickle or maintenance charge function working. I recently added water to all my batteries and heard the bubbling sound from one of the batteries. I did a quick search on here (first time I had ever heard it) and found some threads that seem to indicate that you should put the water in after you charge and not before charging so that the water will mix with the acid before you charge again. If you charge a battery right after adding water (especially if you overfill with water) you will get the bubbling of the water that is not mixed.

[Lou r Pitcher]

The reason to add distilled water only to a fully charged flooded lead acid battery cell is to ensure it is not then overfilled after charging.

A seriously discharged cell's electrolyte will increase in volume significantly as it is being charged. The electrolyte level in each cell should be checked after fully charging so as to be just covering the plates.

Some bubbling ( or gassing) of the electrolyte is normal during multi stage charging.

[Ozark10]

What a great information resource this board is! Always get prompt valuable information whenever I've posted. THANKS!

[GhostComanche]

On mine, it means that they are 90% charged. Solid green when they are 100% charged........ I think

This is the right answer...................RR