Full Battery Charge
Moderator CF K9-unit
Joined: Apr 2012
Posts: 5,842
Likes: 12
From: Alaska
Year: 2000 sport
Model: Cherokee (XJ)
Engine: New 4.0l from s&j engines
Welcome to CF..
Jeep not running battery should be around 11.5-12.5.,,Jeep running and charging, it should test around 13.0v-13.5v
Ive seen it show 14v when jeep is running a few times.
But that was cause it was pushing power into almost a dead battery.
Jeep not running battery should be around 11.5-12.5.,,Jeep running and charging, it should test around 13.0v-13.5v
Ive seen it show 14v when jeep is running a few times.
But that was cause it was pushing power into almost a dead battery.
CF Veteran
Joined: Nov 2015
Posts: 2,863
Likes: 201
From: syracuse ny
Year: 1997 230,000 miles
Model: Grand Cherokee (ZJ)
Engine: 4.0, new lifters valve job with new springs and exhaust valves, preload set with shims
ANY battery the test is the same. A fully charged battery sits overnight holding 12.6. Each tenth of a volt less than that the % charge drops dramatically. A 12.0 volt reading indicates about a 50% charge.
Any battery will charge as long as the voltage reaching it is more than the voltage of the battery ie a 12.6 vdc battery will be charging if you read 12.9 while charging. It will charge faster the higher the voltage.
Any battery will charge as long as the voltage reaching it is more than the voltage of the battery ie a 12.6 vdc battery will be charging if you read 12.9 while charging. It will charge faster the higher the voltage.
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