[NANOG] Re: Small Capacity UPS

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

On 4/9/25 13:49, Gary Sparkes wrote:

> An interesting thing to be concerned about, given average temperature exposures compared to consumer electronics devices 
> with usually inadequate cooling, compared to LiFePo4 in a UPS, which has been my baseline for years now as SLA's age 
> out.

It's often hard to keep Li-Ion batteries at the recommended 25°C. Some 
environments are worse than others, and while Li-Ion batteries can 
tolerate +/- 15°C, it's often not recommended. Some active cooling may 
be required for summer, or for perennially warmer regions.

Of course, you also have to think about extremely cool environments. 
Li-Ion batteries do not like to be charged below 0°C. In such cases, 
better to place a heater next to the battery so it can warm up before 
you start charging it. Charging it when it's that cold will lead to 
plating, which causes short circuits and capacity loss.

Mark.
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