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Lead Acid battery trickle charger pumping out 15.8 volts
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Dabbo56:
Just bought an Energizer battery trickle/maintenance/conditioner for old-fashioned vented 12V lead acid battery. The battery is in reasonable condition and recently charged. My DMM says 15.8 volts, and I’m a bit alarmed. I was expecting a max voltage of 13.8 to as much as 14.4 volts. Should I be concerned?
tunk:
Is it 15.8V when connected to the battery, or when nothing is connected?
If it's the latter and it's an old type transformer-based charger, then it may
be ok, as the voltage will drop with a load.
Dabbo56:
It’s 15.8 v across battery terminals
bdunham7:
What model of charger is it?  Do you have a manual?  It is possible this is some initialization, test or equalization cycle, but if that is the continuous voltage across a good battery then it is cooking it, which is all bad. 

How big is the battery?  Do you have a way of accurately measuring current?



AVGresponding:
Also worth asking if the DMM is reading correctly...
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