Quote:
Originally Posted by patrickt
The voltage increases as the temp goes down, but the capacity decreases. Here's another chart that shows the fully charged voltage ratings for 12v batteries at various temperatures. It increases as the temperature declines. http://www.powerstream.com/SLA.htm |
Patrick those are charging voltages, not battery idle voltages (which will drop with temp.).
Both voltage and current will drop with temp (capacity in A/hrs). Or power if you will (IxE=P) If E (voltage) went up this would negate the decrease in current (I).
I'm sure we're all aware what effect that first freezing night has on that 5yr old battery we were going to change out.
