Old 6V battery - still good?

Piwoslaw · 07-31-22, 05:42 AM

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...

07-31-22, 05:42 AM	#1
Piwoslaw Super Moderator Join Date: May 2009 Location: Warsaw, Poland Posts: 961 Thanks: 188 Thanked 110 Times in 86 Posts	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... __________________ Ecorenovation - the bottomless piggy bank that tries to tame the energy hog.