We have the red HF charger here too. I trust the battery tender more to be honest. I wanted to leave it overnight. Instead of pumping in 10amps for a certain amount of time. I understand it has a "normal flooded" setting.
So i restarted the test. Batteries rested for 1 hour and were at 12.64v.
Plugged in 4amps and lights and at:
1. 10 mins 12.43v
2. 20 mins 12.42v
3. 30 mins 12.41
Not sure why i got 12.3v earlier.
So lets start over. Lets pretend we trust the voltage of my new batteries and theyre at around 90%. Is that normal to sag to 12.4v with a 4amp load?
