GT350 Battery Service issues??

[jpalmerino]

My 2017 has the original battery with my car’s date of manufacture of June 2016. I make sure I keep it charged during the winter months when stored.

This is something I’ll have to look into as I live in NY

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[key01]

My ‘17 is also on the original battery. Trickle charged only through the cold months in storage.

 

[johnny1]

My ‘17 is also on the original battery. Trickle charged only through the cold months in storage.

Trickle charger is probably your savior. When I had my 17 it set outside under a carport and in winter I would drive it around town a little when pavement dry and above 45 degrees (it came without cup 2 tires so no cracking problems) And sometimes it would set for a week. Then when I'd start it I'd get a low voltage battery display but it would start. I bought a trickle charger and put on it the second winter and it never showed that again when I'd unhook it and go for a drive. Probably a lot of sensors etc. that put drain on battery even though its just sitting which not good for battery.

 

[460Fred]

I’ve read all the responses and cannot see a response to the original question.
Did the original owner neglect the battery by leaving lights on or whatever? Answer: No way to tell unless the computer could tell you.
Alternator issue? Answer: You can have the alternator checked but it’s doubtful that’s the problem.
As many have answered, we’re almost certain it’s a battery tender issue. Weird things happen to cars that aren’t driven and neglected.

 

[The Chairman]

12 years on a the stock battery? That's incredible.

I have a red optima battery that is 14 years old and still going strong.
Just keep them charged up and they last forever.
Short story: we had a lead acid battery bank in Cheyenne Mountain that was over 50 years old. Was essential a strung together group of 12v batteries. Finally removed it a few years ago and it was still going strong.

 

[PP0001]

My ‘17 is also on the original battery. Trickle charged only through the cold months in storage.

Aside from employing the use of a battery tender on a regular basis it is very helpful to disconnect the battery on our cars when it comes to long term storage especially if a battery tender can not be utilized during this time period.

 

[rogersteele]

This Top Flight AGM Battery and Battery Maintainer are your friend, if you are not daily driving your GT350.
With the stock OEM battery your battery voltage will likely be below 11.5v after 10-14 days setting idle.
I was experiencing issues where the keyless entry system was faulting at those voltages even thought the engine would crank nominally.

 

[Big Ernie McCracken]

I had mine on a trickle charger over winter and I have been driving it every few days over the last month. It just sat for a week , went to start and was a little weak. Got back in after coming out of a store and it barely cranked. Got home and tried starting a half hour later and it wouldn’t crank. My alternator was pushing 14.9 volts so something weird is going on. Car has 3100 miles, we bought it new as a leftover last year. Maybe with the car sitting in the show room so long the life has fallen away.

 

[Caballus]

I had mine on a trickle charger over winter and I have been driving it every few days over the last month. It just sat for a week , went to start and was a little weak. Got back in after coming out of a store and it barely cranked. Got home and tried starting a half hour later and it wouldn’t crank. My alternator was pushing 14.9 volts so something weird is going on. Car has 3100 miles, we bought it new as a leftover last year. Maybe with the car sitting in the show room so long the life has fallen away.

Unfortunately, your experience is not unusual.

https://www.mustang6g.com/forums/th...-our-battery-casing.97848/page-6#post-2864769

 

[rogersteele]

Unfortunately, your experience is not unusual.

https://www.mustang6g.com/forums/th...-our-battery-casing.97848/page-6#post-2864769

It sounds very typical behavior of a battery with a shorted cell

 

[JAJ]

When replacing the battery on GT350, especially with different configuration, do you need recode the battery to let battery management system (BMS) know of the new battery? I recently replaced battery on my S4(nothing wrong with the battery but it was 9 years old and I didn't want to run on the borrowing time) and recode the new battery.

There was another thread about battery recalibration recently - the precise answer is a qualified "no", you don't need to recalibrate with a tool. The onboard battery manager resets and recalibrates automatically if the vehicle is totally undisturbed for 8 hours - no door opening, no key nearby, no open the trunk, etc.

 

[rogersteele]

There was another thread about battery recalibration recently - the precise answer is a qualified "no", you don't need to recalibrate with a tool. The onboard battery manager resets and recalibrates automatically if the vehicle is totally undisturbed for 8 hours - no door opening, no key nearby, no open the trunk, etc.

No battery recalibration that I am aware of.
The charging is going charge to set voltage

 

[FDHog]

I had mine on a trickle charger over winter and I have been driving it every few days over the last month. It just sat for a week , went to start and was a little weak. Got back in after coming out of a store and it barely cranked. Got home and tried starting a half hour later and it wouldn’t crank. My alternator was pushing 14.9 volts so something weird is going on. Car has 3100 miles, we bought it new as a leftover last year. Maybe with the car sitting in the show room so long the life has fallen away.

I bought my 19 off the showroom floor 2 months ago. Battery was a little weak. With all this COVID going around, instead of going to a dealer, I went out and got an Advanced Auto Gold 590CCA battery. Charged it when I got it home. Car sat for one night. When I started it the next day, it started fine, but my alt was pushing 15.2 volts. Took it out today and put it on a charger. Will take it off and let it sit overnight to see if it drops. If it does, it's going back.

 

[460Fred]

And then there is this.

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