Need some battery advice!
I'm currently having had an issue with my Interstate 12V (dual) batteries in my Arctic Fox camper, in that after 3 days of boon docking, my fridge stopped working, thus realizing I must be below 6 vol...
Forum Discussion
Powerstroke2000 wrote:
I did pull my batteries and put them in my garage on a piece of carpet and my 4 stage charger started out showing 25% power in the battery, and within a half hour it was up to 100%. I'm unsure if this is a true 100%, or if the charger has been fooled in some way, as it didn't take long to get to where it should have been.
The charger judges the battery state of charge by how much current it takes to raise the voltage to whatever voltage the charger uses. Typically in newer chargers that's about 14.7V during the main charging process. Most chargers decide a battery is fully charged when the charger can raise it to 14.7V with 1 Amp or less. A heavily used or sulfated battery can charge very quickly because it has a very low usable capacity.
