OEM Batteries are junk

[Bamastangbham]

Yes mine 19 bullitt was doing some really odd things when it was going out about 4 months ago sometimes it would crank and sometimes it would not morning time was fine i would drive to work and it would not crank. I bought a gel battery diehard and its worked great crazy how most batteries only have a 2 year life now the one i bought was 3 years and was more expensive but yeah wanted to share with everyone.

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[Bamastangbham]

Lock the car !

Good advice

 

[Bamastangbham]

Well mine just bit dust on my 19 bullitt wow what did you replace it wit

My 19 bullitt has setting In the cluster that you can silence the alarm with key fob in which the lights flash instead of honk. Seems like I started having trouble with mine when I cut horn off in the sitting. Needless to say my battery just bit dust and wow batteries is not like they use to be

Thats excatly when mine went out

 

[Vlad Soare]

I may be one of the very few who find the OEM battery and the BMS strategy perfectly fine.
1.5 years and 9k miles down the line, the stock battery still reads fine on the tester. State of health 100%, internal resistance 3.5mΩ. The open voltage after a night's rest (but having been driven the day before) is 12.72V.
I've also measured the parasitic draw. Ford says in the service manual that, depending on the installed features, it should be between 25 and 50mA. Mine is 30mA. This should in theory allow for two months until the state of charge drops to 25%. At 25% SOC (i.e. 12.0V) a healthy battery should still be able to start the car.
Of course, there's also the natural discharge over time that must be accounted for, so in real life you may not get two full months, but one month should be easily achievable. If the battery is dead after one week, then something isn't right. That's neither normal nor acceptable.

 

[Reap]

I may be one of the very few who find the OEM battery and the BMS strategy perfectly fine.
1.5 years and 9k miles down the line, the stock battery still reads fine on the tester. State of health 100%, internal resistance 3.5mΩ. The open voltage after a night's rest (but having been driven the day before) is 12.72V.
I've also measured the parasitic draw. Ford says in the service manual that, depending on the installed features, it should be between 25 and 50mA. Mine is 30mA. This should in theory allow for two months until the state of charge drops to 25%. At 25% SOC (i.e. 12.0V) a healthy battery should still be able to start the car.
Of course, there's also the natural discharge over time that must be accounted for, so in real life you may not get two full months, but one month should be easily achievable. If the battery is dead after one week, then something isn't right. That's neither normal nor acceptable.

Mine is still going strong after 5 years. Too bad all my batteries have not been this good.

 

[DougS550]

I have two dead cells in my 19 Mustang GT, so I am going to buy a Duralast 96R EFB Battery to see how long it last.

 

[PC_GUARD]

Locking the car shuts everything down? I park in my garage with the key in it, probably a no no.

I know 2014 BMW's you have to get the key far and away from the car or it will run the battery out

 

[Vertex]

Locking the car shuts everything down? I park in my garage with the key in it, probably a no no.

I know 2014 BMW's you have to get the key far and away from the car or it will run the battery out

I have not 100% verified, but have been told before if you leave the fob in the vehicle if it's a push button start it will randomly wake things up with it left in the vehicle since it recognizes it when you get close to open a door per say that has the nifty no touch open or whatever it's called that has escaped me.

 

[PC_GUARD]

I have not 100% verified, but have been told before if you leave the fob in the vehicle if it's a push button start it will randomly wake things up with it left in the vehicle since it recognizes it when you get close to open a door per say that has the nifty no touch open or whatever it's called that has escaped me.

Thats how the bmw works. When the fob is in range its waking up

 

[Dave2013M3]

I still have the OEM battery in my 2015 Focus SE with 75K miles on it...I just probably jinxed it.

Update, my battery just finally died on my 2015 Focus after 6 years and 78K miles.

 

[Dave2013M3]

Thats how the bmw works. When the fob is in range its waking up

Correct, in BMWs don't ever leave the keys over night in the car. It can drain the battery. Ask me how I know...err.

 

[Vlad Soare]

Mine is still going strong after 5 years.

Update, my battery just finally died on my 2015 Focus after 6 years and 78K miles.

The stock battery in my wife's Kuga also died after six years. In my first Mondeo they discovered it was a bit weak after five years and replaced it, though it could have probably lasted one more year easily. I don't know about my second Mondeo, as I sold it after three years and the battery was still strong.
I do believe that the reason they last so long these days is the BMS. The BMS is really smart and keeps the battery healthy for a longer time.

 

[WD Pro]

There have also been a number of internal improvements that will aid plate longevity and therefore battery life.

I know it's 'just lead acid', but its still subject to small incremental improvements

WD

ps : I got nine years from my daily driven Kia battery

 

[LIPony]

Mine is going on 7 years now. I only drive it in the spring and summer. It is attached to a tender most of the time. It might be time to replace it now.

 

[Labradog]

Mine is going on 7 years now. I only drive it in the spring and summer. It is attached to a tender most of the time. It might be time to replace it now.

I have a 2016. Cleaned off a little corrosion on the negative terminal this weekend, but the battery tested fine.

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