|
|
|
|
|
#1
11-12-2005, 09:28 AM
|
||||
|
||||
|
Normal batteries voltage during cranking
My car is a 96 E320, but I guess the answer to my question applies pretty well to any model:
It is normal for batteries voltage to drop momentarily during cranking due to the significant load. Just wondering what is considered "normal" during this brief period, for healthy batteries? 
|
|
#2
11-12-2005, 09:43 AM
|
||||
|
||||
|
How much of a drop are you seeing? Voltage should remain fairly steady (+-1V), although the AMPS used during that cycle increase dramatically.
__________________
2009 ML350 (106K) - Family vehicle 2001 CLK430 Cabriolet (80K) - Wife's car 2005 BMW 645CI (138K) - My daily driver 2016 Mustang (32K) - Daughter's car
|
|
#3
11-12-2005, 09:53 AM
|
|||
|
|||
|
High current draw drops voltage, and the usual minimum cranking voltage spec is 10.5v for a 12v battery, which should actually measure about 12.6 open circuit, no load, at room temperature when fully charged.
Duke
|
|
#4
11-12-2005, 12:19 PM
|
||||
|
||||
|
The higher the current draw, the lower the voltage will go. Also, the lower the temperature, the lower the voltage will go. There is no set answer without taking load, state of charge, and temperature into consideration.
__________________
1989 300 SEL that mostly works, but needs TLC
|
 |
| Bookmarks |
| Thread Tools | |
| Display Modes | |
|
|
Linear Mode
