Old 6V battery - still good?
Helping family clean their house I found a 6V 4Ah sealed lead acid battery. Family said they don't need it, so I took it for some projects.
The label states the voltage should be 7.2-7.5V, but at home I checked that it has only 3.2-3.3V. Is this too low? Does voltage this low mean that it was discharged too deep and/or for too long, and the battery will not be useable?
If it can be saved, then do I need a dedicated 6V charger? I don't have one, and not sure I want to invest in one. I doubt I can use the 12V charger for my car battery...
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