I have charge house battery for 3hours and I check it and it only shows 11.58 volts it was showing 11.5 volt before I charge it, I just got my motorhome from cam ping world in which they had it for 3...
There are several DIAGNOSTIC battery charges available. Most from Schaurer/sears. They will analyze the battery and either tell ya its bad or send an error code. Sears had some 3amp charger maintainers and they do a good job. There is also a charger that is also a starter booster and then can also be a maintainer/charger again available at most auto stores.