BFL13 wrote:
mrekim wrote:
BFL13 wrote:
It should be around 14.8 at 68F.
If you have somehow hit Equalize (green light flashing) by poking a pin in the hole for that, then it would go into the 15s (15.7v nominal for Equalize.)
Nope, it's not in equalize.
I went and got an IR temp meter. I was off the temp in the basement. I shot the battery and the charger and got 55-56 degrees. Doe that seem more reasonable for a regular cycle?
The table I have for equivalents to 14.7v at 77F is that at 55F it would be 14.99v. So it may not be that far out of whack, but at the high end of whatever its +/- margin of error is?
I have not done a calibration check on mine but it certainly does the temp comp. It will go over 16v in Equalize in cold temps.
I agree with BFL.
I have a Schumacher SC-12000A multistage Speed Charger. When charging a battery outside in cold weather my charger would peek out at 16.1 volts in cold temperatures of 10 to 20F. This would be the last portion of charging when the battery is above 95% SOC. The amps would drop to 2 amps and tapering while the voltage held the peak to shut-off. If temperatures were closer to 32F the peak would be around 15.5 volts. The charger never allowed the battery to overheat. Last winter BFL had a post were we had some graphs of different charging profiles done in cold weather.
This portable chargers were not meant to be used similar to the chargers installed in RV's. If charging batteries installed in RV's the batteries should be on "disconnect" to protect electronics in the RV circuits.
My model of charger was a heavier duty version compared to the the BD (Vector) 3-stage charger. It was generally used in the racing industry. They discontinued this model which was the largest multi-stage portable in their line. I suspect some people may have used it in ways that could have damaged electronics in a circuit.
