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Smitty77's avatar
Smitty77
Explorer
Mar 05, 2018

Lifeline Battery Recovery experiences?

I had a thread about our Magnum MS2812 going into Fault code mode overnight while boon docking. Posted under Magnum because I first thought I may have had a problem with my program parameters, and possibly a weak/going out circuit board(s), after a lightening outage at a park last year.

Looks like I have Lifeline Batteries that have grown weak on me. These are 5 years old/usage X's 4 L16's.

I monitored the batteries during the night, via Magnum remote panel. SOC remained good, based upon AH's out, slowly drifting down to 85% SOC around 5:45AM. Full Bank Voltage down to 11.3V, current AH draw of 17.0 - 17.4 AH's. (These are under load reported Voltages on the remote.)

As I watched, with the same 17.0 - 17.4 AH's draw, the reported under load Voltage started to drop .1 and sometimes .2V, over 4 minute period down to 10.3V.

I took measurements at the battery with Multi Meter. 10.29 - 10.31V. I did still cable connected measurements of each battery and recorded 6.15V / 5.91V / 4.5V / 4.14V.

During the day, I brought the bank up to a full charge. Then afterward's did two back to back four hour Conditioning/Equalizing.

(Note: When I bought the batteries in Jan, 2013. The Lifeline Tech Manual I read, Rev C, said to only Condition the batteries if noticeable capacity was lost. I note that the current Rev E states that Conditioning every 2-4 weeks, maybe be the right thing to do under certain circumstances. (Talking to a boating buddy on the phone yesterday, he said he knows he read that same paragraph in Rev D too. But he could not recall if it was in Rev C(?) and I had just missed it.)

I only mention this Tech Manual here, because until late December of 2017, I'd never Condition this set of batteries, and that was only a four hour Conditioning, via the MS2812.

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OK, long background to get to my question.

If I find after these Conditioning's that the battery capacity is still not healthy. Would taking the batteries into a shop that Lifeline recommends for Deep Discharge Recovery process provide any chance of further restoring the weaker batteries?

Has anyone had experiences with Lifeline Deep Discharge Recovery process?

Would like to get another year or two out of this bank of batteries. May even jump back to only the two best batteries and run with 400AH's if needed, to get a few more years out of it. (Even with the Samsung fridge, we could turn the Inverter off for few hours of a time during the night, to accommodate a half size bank of what we're used to running on.)

Info sharing, and opinions most welcomed:)!

Best to all,
Smitty

32 Replies

  • So Gordon - In the boating community, you're saying their's a high probability of these becoming non environmental friendly boat anchors:)!

    We come off of this trip mid April, and will limp along as needed.

    As I've read here, and elsewhere many times - a non resting battery voltage read is not a true measurement of the batteries voltage. We're moving sites today, but when we get to the new site (Same campground.) I'll make sure the bank is fully charged again. Then we'll turn off all power draw for 3-4 hours, and I'll take a reading at the batteries again.

    Question: I'm not disconnecting cables, so these 4 6V's are connected. When I'm taking individual battery readings of interconnected batteries, are they valid or off because they're interconnected? (Really want to see what the 4.15 and 4.5V batteries reading of two days ago, look like after Conditioning cycles.)

    TIA,
    Smitty
  • Loss of capacity means you get 11 volts when charging is complete. That's my interpretation at least. Sounds like you're beyond that point.

    It could be a manufacturing defect allowed the glass mats to dry out and the battery is now toast.

    If you dig around on YouTube there's videos on how to rehydrate an AGM battery... It involves drilling.

    If you want to try rehabilitation, pull those batteries from the RV and work on them somewhere a rupture or explosion won't do much damage.

    You'll need a beefy adjustable power supply like a Meanwell or Megawatt, a standard battery charger won't hit the voltage needed.