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13.7V when and where??
What I meant was....Yesterday its brand new bosch 70a less than a month old but I charged it yesterday as a prevention rather than cure
When did you take the reading...engine off, engine on, after a run, electrical loads on or off...etc
and Where did you take the reading...across the battery, from Alternator, from Alternaotr to battery etc....
13.7V would be considered to low for an engine running reading...would expect more than 14V.....this subject has been done to death in recent times on LZ!