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Old 12-29-2017, 09:14 PM   #1
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Lithium batteries

Tonight I went to a Batteries + Bulbs store to get a replacement battery for an uninterruptible power supply (UPS) that I have. While I was there I asked about the current status of lithium batteries; I told him that I have a travel trailer and will need to replace its batteries at some point.

He replied that the lithiums weren't doing so well. He used to sell lithium motorcycle batteries but their failure rate was too high. In particular, if the batteries drained too low they would not recharge and were ruined. The store finally quit selling them. FYI.
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Old 12-29-2017, 09:23 PM   #2
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Rats. I thought this might be the year of the Lithium battery for $1 USD per Amp-Hour.

Wishful thinking?
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Old 12-29-2017, 09:30 PM   #3
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Yeah, I'm also disappointed. This came up because the battery I pulled from the UPS had a cracked case. When I brought it into the store the man said not to worry-- those batteries were AGMs and wouldn't leak; he could still recycle it.

Then I told him about the trailer and asked if he sold AGMs for it. He said he either would have them in stock or could get them. That's when I asked about the lithiums.
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Old 12-29-2017, 09:37 PM   #4
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Technomadia has been running Lithium batteries in their rig for a number of years now and reporting on them regularly. This is probably one of the top spots to get real world info on that Lithium Ion Batteries for RV Motorhome House System - LFP / LiFePO4 | Technomadia
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Old 12-29-2017, 10:49 PM   #5
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Originally Posted by Mike Lewis View Post
Yeah, I'm also disappointed. This came up because the battery I pulled from the UPS had a cracked case. When I brought it into the store the man said not to worry-- those batteries were AGMs and wouldn't leak; he could still recycle it.

Then I told him about the trailer and asked if he sold AGMs for it. He said he either would have them in stock or could get them. That's when I asked about the lithiums.
I'm loving my 75 amp-hour AGM Sears (rebranded) 7 year old trolling battery. I give it a charge a few times a year and it hasn't let me down.

My two 100 amp-hour AGMs in the trailer should be just as good but they are only 2 years old. They are also "Sears" and I got them at a fantastic price, but Sears no longer sells them (or most anything else) these days. As best as I can determine they were made by Odyssey and buying them directly will cost an arm and two legs.

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Old 12-29-2017, 11:42 PM   #6
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well the 787s had some shaky starts that were caused by lithium batteries and galaxy note 7 too...
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Old 12-30-2017, 10:47 AM   #7
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well the 787s had some shaky starts that were caused by lithium batteries and galaxy note 7 too...
The lithium iron phosphate batteries (LiFePO4) used by Technomadia are NOT chemically the same as the lithium ion batteries (LiCoO2) used in a cell phone, or the lithium ion batteries that experienced a thermal runaway in the 787 for that matter. They're perfectly safe when installed correctly, and there's even a case to be made that they pose less risk than a standard flooded cell deep cycle battery.

http://www.newcastlesys.com/blog/lit...iron-batteries
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Old 12-30-2017, 12:06 PM   #8
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The lithium iron phosphate batteries (LiFePO4) used by Technomadia are NOT chemically the same as the lithium ion batteries (LiCoO2) used in a cell phone, or the lithium ion batteries that experienced a thermal runaway in the 787 for that matter. They're perfectly safe when installed correctly, and there's even a case to be made that they pose less risk than a standard flooded cell deep cycle battery.

Lithium Ion vs Lithium Iron Batteries
Robert: thank you for clarifying this. I didn’t think we were talking apples to apples and were unfairly condemning the lithium batteries one would use in an RV.
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Old 12-30-2017, 01:11 PM   #9
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I'm loving my 75 amp-hour AGM Sears (rebranded) 7 year old trolling battery. I give it a charge a few times a year and it hasn't let me down.

My two 100 amp-hour AGMs in the trailer should be just as good but they are only 2 years old. They are also "Sears" and I got them at a fantastic price, but Sears no longer sells them (or most anything else) these days. As best as I can determine they were made by Odyssey and buying them directly will cost an arm and two legs.

--
Alan
Just as a point of reference, we have a cabin in Central Washington, where it can easily get above 100 degrees in the summer, and in the teens and lower during the winter. In June 2007 I installed a pair of Trojan 105 Ah AGM 12v batteries (connected in parallel), a 120w solar panel and a MorningStar ProStar charge controller. I limit the depth-of-discharge to 25%. The last time we visited the cabin (Sept. 2017) the batteries were fully charged and still going strong, a little over 10 years of service! Needless to say, I'm very happy with the setup, and have duplicated it in our 19' Escape, with the exception being a 160w solar panel.
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Old 12-30-2017, 01:32 PM   #10
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Sounds like a durable setup Chuck. I'm curious though - wouldn't a pair of Trojan 6V AGMs give you a little better performance in the same space?

https://www.thesolarbiz.com/trojan-s...RoCSU8QAvD_BwE
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