Originally Posted by Randyonr3
Lifeline states their 4d to be fully charged at 12.8 and 50% at 12.2 and as I said, ours being lifeline 4 d to be over 12 years old and still working great.
We are looking to replace befor we head
Good news, I spoke to, and worked with the very helpful reps from lifeline and we determined the batteries are actually ok.
We had gone to shore power
for 3 days and with charging
the batteries came back. Then the reps explained what the batteries should perform like. We did some load tests. One I did with a fellow boater Jim here who brought over his load tester. That showed good batteries. My test was to turn on approx 8A of load and watch the voltage. I did not realize that an initial drop is normal as the voltage goes down to provide the Amps needed by the load. It steadies (varies with the load where), and holds there. In my case 12.6...for a couple of hours. Then the drop starts again slow at first. At 12.2 (under load) I am getting low and time to recharge.
With the explanation about voltage with and without load I can now much better understand the batteries and better care for them. I wish I had two more now but I can live with these two now.
FWIW I have ordered LED replacements
for the Halogen lights.
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