I have two car type batteries that I have in my basement. One is to start my generator and the other is a spare. I charge them once a week at 1.5A for three hours. I check the voltage before charging. One of them usually reads 12.60 volts and the other 12.76 volts. I checked the acid level on the 12.76 volt one and it is OK. Why would it read so high?
---MIKE---
You are concerned about a .16 v difference between the two?
JK
Normal variance.
This was measured a week after charging - just before charging
---MIKE---
New Hampshire
You dont need but to charge them every few months , charge them to
13.3v not 12.76 , a discharged batter is ruined quickly by sulfation. 12.76 is maybe 80% charged. Some chargers can be adjusted if you open them up.HomeOwnersHub website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.