[NANOG] Re: Small Capacity UPS

[Mark Tinka via NANOG <nanog () lists nanog org>]

On 4/7/25 08:30, Vasilenko Eduard via NANOG wrote:

> lithium is a)expensive, b)dangerous (it could quickly burn your house), c)would be dead in 4 years.
> We're talking about stationery; it's not wearable, right?
> Then there are many LiFePO batteries on the market.

Ummh, the Li in LiFePO4 (a.k.a LFP) is Lithium.

Li-Ion batteries come in all manner of chemistries, where different 
materials may be chosen for the cathode. While there are a number of 
them, the most common ones are NMC (Nickel Manganese Cobalt) and PO4 
(Phosphate).

NMC has generally been used in EV's due to its high energy density, but 
OEM's have now started moving to LFP for this, where LFP was 
traditionally used for stationery applications (home backup, for 
example) due its higher safety properties.

LFP is cheaper than NMC. And while NMC will provide fewer cycles than 
LFP, the time period will vary based on usage, even with factoring in 
calendar aging.

Mark.
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