Li Snap Pack anomaly

pianotuna wrote:
Hi All,

I brought my li snap pack home from the RV storage--as I think freezing is not a great thing for that chemistry.

I happened to check the snap pack state of charge at the RV. The temperature was 0 C (32 f).

reading suggested 96% state of charge.

The next day at the Condo at 21 c (70 F), I checked again. It was reading 80%.

Anyone have an idea about what is going on?

yup, like any battery the capacity goes up with the temprature. Just trying to figure out how to explain it so it makes sence.

lets say you have a 100 AH battery and you have 80Ah in it. at room temp (what ever the standard is) ity will be 80% charged, as the temprature drops the capacity also drops so the battery will apear to be a higher state of charge, but it is realy just temprature compensation .

still probably didn't explain it very good. same thing happens with lead acid batteries but to a much larger degree.

how do ou like thoes Don, I have been thinking of getting them for every one for christmas this year?

Steve