John, that is the best advice and people should pay attention and do just that. I see people often that will tell me the battery looked good. One guy told me that and he had a 19 year old battery and could not understand why things went bad. I am not that smart to know the battery status, I still need a meter with a load imposed on the battery.
I remember a long time back on the forum some guy was being funny and told people he could touch a battery to his tongue and tell the voltage. That was something else. Nobody can top that one.