Resending this without pictures because file size rejection. I'm just catching up on this thread so I have probably missed a bunch but I wanted to share my experience. I originally started to replace old batteries in my UPS's with AGM batteries instead of SLA. More recently I have been going with LiFePo4 (Lithium Iron Phosphate) and with units with 2 batteries (24V) adding in a battery balancer. examples attached. that white, yellow one is like 28 years old. running strong. my observations and research reveal that old UPS units sometimes float at a higher voltage, which makes LiFePo4 a perfect upgrade to lead acid based battery technology. Also should last forever. (10+ years and thousands of cycles) I have 5 UPSs, most I got for free. I also have a solar system in the back yard and here in Florida those LiFePo4 batteries (the cheapest I can find on Amazon at the time) are doing just great keeping all the cameras in the backyard running plus I run power tools etc from them as needed. they're not making lithium iron phosphate batteries with high current cranking capacity. next time I have a car battery to change the prices should drop low enough for that I'll be replacing it with that. On Mon, Apr 7, 2025 at 12:00 PM Mark Tinka via NANOG <nanog@lists.nanog.org> wrote:
On 4/7/25 12:54, Jared Mauch via NANOG wrote:
And the battery has inbuilt fire suppression system:
https://eg4electronics.com/backend/wp-content/uploads/2024/03/EG4%C2%AE-Indo...
Most things can catch on fire, sure.. but not everything lacks any safety systems.
LFP will experience thermal runaway at about 270°c, while NMC will experience the same at 210°c.
It's quite a lot to subject your batteries to, especially if you have a reliable BMS.
On average, the failure rate of quality LFP cells is about 1 in 10 million.
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