I got a 45Ah 12V traction battery for my experiments and I was assuming that I can recharge it using a normal car battery charger (the main difference between 12V car starting battery and 12V lead-acid traction battery being that traction battery is more deep-discharge resilient and support way more cycles).
But there is some information label on battery that say there are 2 different charging methods for 2 different use cases, which confused me:
- Stationary use: charging voltage 13.6 - 13.8V
- Cyclic use: charging voltage 14.5 - 14.9V
Max charging current: 13.5A
The microprocessor controlled car battery charger I have is using 4A charging current, so I guess it should work, just might be a bit slower, but I am not really sure how the lead-acid battery charging process works. Is that charger going to recharge the battery until some predefined target voltage, or is it using some sophisticated calculation to figure out if battery is really charged to 100%?
I would like to avoid car charger stopping the charging process at, say, 50% of actual battery capacity, because I noticed that different 12V lead-acid batteries, seem to have different voltage at "full charge". How is this full charge determined? Is this car battery charger going to work for this, or do I need some special charger?