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It's going to depend on how healthy the battery is, weather, and if the truck is warm or cold. I would say I'm the 11.5-12.0 VDC range is probably where you would start to see the issue. I've seen a battery at ~11.0 VDC start a vehicle before, but it wasn't happy, and not someone I'd recommend trying repeatedly.
It's going to depend on how healthy the battery is, weather, and if the truck is warm or cold. I would say I'm the 11.5-12.0 VDC range is probably where you would start to see the issue. I've seen a battery at ~11.0 VDC start a vehicle before, but it wasn't happy, and not someone I'd recommend trying repeatedly.
Thanks..That helps..My truck will drop to 11.5 volts after sitting 3 days..
If your resting voltage is 11.5V, you either have a bad parasitic draw, or your battery is bad.
This chart shows what resting voltages should be.
When my start stop quit working, I new I would be getting close to needing a new battery. During the winter, after the first hard start, I replaced it with another motorcraft from Rock auto. Same thing started happening again. Auto start/stop quit working, I put a meter on it and the resting voltage was 12.3. Rockauto warrantied it and it has been working fine ever since.
If your resting voltage is 11.5V, you either have a bad parasitic draw, or your battery is bad.
This chart shows what resting voltages should be.
When my start stop quit working, I new I would be getting close to needing a new battery. During the winter, after the first hard start, I replaced it with another motorcraft from Rock auto. Same thing started happening again. Auto start/stop quit working, I put a meter on it and the resting voltage was 12.3. Rockauto warrantied it and it has been working fine ever since.
I feel the chances of me having two bad batteries is pretty low..
The RC = reserve capacity, of a Battery is important to how long it can sustain a light draw when setting.
The Motorcraft Battery is among the higher rated for this if a search is done of many other mfgers, for the same Battery size range.
A good sight for this is all the MC Battery listings data and their rating to see this value, as a reference.
Otherwise a drain test should be done to see if the vehicle has an excess drain issue when in sleep mode.
3 days is to short a time to lose that much charge from a drain that should be no more than 50 to 60 ma. from a Battery capable of supplying 100 amps to a Starter during Cranking.
The RC = reserve capacity, of a Battery is important to how long it can sustain a light draw when setting.
The Motorcraft Battery is among the higher rated for this if a search is done of many other mfgers, for the same Battery size range.
A good sight for this is all the MC Battery listings data and their rating to see this value, as a reference.
Otherwise a drain test should be done to see if the vehicle has an excess drain issue when in sleep mode.
3 days is to short a time to lose that much charge from a drain that should be no more than 50 to 60 ma. from a Battery capable of supplying 100 amps to a Starter during Cranking.
Good luck..
Dealer said nothing was wrong but eventually put in a new battery anyway...Didn't help..
Well, the answer >nothing is wrong< is suspect without knowing how they came to that conclusion.
Would you believe that all the vehicles on their lot have dead Batteries after 3 or even 5 days, from a full charged condition?
Like how many hoods seen up even in a week's time with, chargers attached.?
Just saying.
Good luck.
Well, the answer >nothing is wrong< is suspect without knowing how they came to that conclusion.
Would you believe that all the vehicles on their lot have dead Batteries after 3 or even 5 days, from a full charged condition?
Like how many hoods seen up even in a week's time with, chargers attached.?
Just saying.
Good luck.
They eventuallly changed the battery out for a new Delco but it did not help..
