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I wouldn't be too surprised that, with the increasing use of "smart" charging systems in today's cars/trucks, someone - somewhere - will soon come out with a BMS "reset tool" for the DIYer to use when replacing his own auto battery (just like the many "scan tools" we now see in the aftermarket)....
 
Seem like the old 13.8 volt charging system is dead. Just like everything else, today's charging systems are adaptive to give optimum performance.
12V batteries aren't 12V and because the laws of physics apply here the "13.8V" charging system isn't going anywhere. Lead oxide and sulfuric is a losing battle that will continue to eat batteries long after we are gone no matter what kind of fancy charging cycles we implement.
 
Yes they are actually 12.6 V when fully charged. 13.8 VDC is a nominal alternator/rectifier output voltage.
According to "Battery Tender" website, graphs show that different voltages are required for optimum charging depending on the battery's state of charge. The required range is not that wide, but nonetheless is there.
Hence the need for the battery sensor and "smart alternator".
I've been an electrical engineer for over 35 years, and have never delved into car batteries this deeply - this thread has opened up whole new learning experience for me.
 
Yup, same here. I am a EE who writes firmware for battery powered devices (not quite as many years!). Until the past year I only had to worry about discharging the batteries (primary cells). I have now written the code to manage a rechargeable battery, but it is a LiIon pack. Getting the most service life out of a rechargeable battery is not so simple sometimes. I am sure the tech that these cars use is much more advanced that cars even 10 years ago!
 
I wonder if replacing the smaller battery with the larger one will result in a shorter service life for the bigger battery. The BMC will not have the "map" for the larger battery and may be confused that after "x" minutes at such-and-such a charging voltage the battery should be at a given voltage. The larger battery may confuse the BMC and generate spurious battery messages.
 
Yup, same here. I am a EE who writes firmware for battery powered devices (not quite as many years!). Until the past year I only had to worry about discharging the batteries (primary cells). I have now written the code to manage a rechargeable battery, but it is a LiIon pack. Getting the most service life out of a rechargeable battery is not so simple sometimes. I am sure the tech that these cars use is much more advanced that cars even 10 years ago!
Yes Li-Ion batteries are a real "bear" to charge. One wrong move and you can kill it in no time flat. Overcharge it and it'a a gonner. Overdischarge it and it will never take another charge. So many factors to consider.
 
I wonder if replacing the smaller battery with the larger one will result in a shorter service life for the bigger battery. The BMC will not have the "map" for the larger battery and may be confused that after "x" minutes at such-and-such a charging voltage the battery should be at a given voltage. The larger battery may confuse the BMC and generate spurious battery messages.
Yes, that risk is definitely there. Most likely outcome is that the larger battery will perform no better than the OEM battery.
 
I wouldn't be too surprised that, with the increasing use of "smart" charging systems in today's cars/trucks, someone - somewhere - will soon come out with a BMS "reset tool" for the DIYer to use when replacing his own auto battery (just like the many "scan tools" we now see in the aftermarket)....
It is just a matter of time before someone come out with a tool. All "modules" in the car are connected via canbus. With correct signal, a reset tool is possible. I found a site in Russia that sells a module to re-program certain things. Here's the link Diagnostic adapter UCDS | UCDS – Universal CAN Diagnostic System.
 
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It is just a matter of time before someone come out with a tool. All "modules" in the car are connected via canbus. With correct signal, a reset tool is possible. I found a site in Russia that sells a module to re-program certain things. Here's the link Diagnostic adapter UCDS | UCDS – Universal CAN Diagnostic System.
Actually, aftermarket devices are available now, but they are the professional all-makes scanners used by independent shops.
The scanner is a few thousand dollars, then you need to buy vehicle-specific software to run in it.
These are sold by professional tool suppliers, like Snap-On, Matco, and others.
Nope - not available at Pep Boys or Autozone.
 
Finally!! This has been a long time coming.
In recent years, car makers have been very stingy with their service and tech data.
Maybe someday, independents might even be able to become authorized warranty service centers.
No more captive customers for the dealerships - yeah man!!!!!
That's definitely good news but the agreement are between manufacturers and independent shop. I hope DIYers aren't left out in the cold.
 
Alphapart, I think I love you!

Seriously, your battery replacement post is excellent and it really helped me out.

I like my 2013 Titanium a lot, except for the battery and a power system that seems determined to kill it. That happened on Thursday. Admittedly I left the car in my driveway overnight in gear, but why should that draw a battery flat? I'd also made that same dumb mistake once before, and the Titanium had gone flat by itself when left unused for 6 weeks.

At any rate, the third time was true death. The battery wouldn't hold any charge at all, and that's when I went looking for help and found your post. Yesterday I installed a Walmart EverStart Maxx H7 94r battery per your instructions and everything went well. I have just two notes for others looking to replace and upgrade their Escape battery:

1. My Titanium has a round air filter different than Alphapart's and it's whole casing has to come out to change the battery. Fortunately, carcarekiosk has good videos on how to remove the air filter case:

Battery Replacement: 2013-2013 Ford Escape - 2013 Ford Escape SE 1.6L 4 Cyl. Turbo

2. I had to slightly modify the steel battery hold down strap to fit it over the EverStart H7. The tabs that fit over the studs need to be lowered about 3/8 inch. I used a vise, ball peen hammer, and lineman's pliers but the steel if fairly easy to work.

So far the Escape seems to like the new battery as best I can tell. At least it will play the radio longer with the engine off than it used to. I will keep an eye on this, but tend to go with the idea that smart charging system can figure out a battery change on its own. (That's certainly the case with smart regulators in boats, as long as you don't change the battery chemistry type.)

You are a saint in my book, Alphapart!
 
Alphapart, seriously, your battery replacement post is excellent and it really helped me out.
My sentiments exactly! I've had my OEM battery discharge completely twice now during extended periods of being parked (over 4 weeks each time). I know there was a TSB for this regarding the sunroof motors so I guess it's time to take it in and get the TSB performed. I'm worried about the current state of my battery after these full discharges.

Today I had someone pickup the DieHard Advanced Gold AGM from Sears for me. It wasn't cheap, $180, but when the car goes in next week for the TSB fix I will also have the new battery installed and ensure they reset the battery monitoring system.

For anyone interested, here's the details of the DieHard from Sears:

Sears DieHard Advanced Gold AGM Battery
Group Size 94R
Item# 02850793000
UPC: 083996087385
Part No. 50793
CCA 800
Reserve Capacity 140
20Hr Rate 80Ah
Sale price 179.99 ($15 core charge)
 

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This past April I took my vehicle in to the dealer to get a TSB performed and while there I asked them to install the Sears Die Hard 94R AGM battery I purchased.

Dealer performed the TSB, but said they couldn't replace the battery as it wouldn't fit. We went back and forth for a good while, I kept telling them it would fit, that I measured the box and battery and I knew it would fit. They kept telling me 'no it won't fit, we measured it too' and I seriously questioned their ability to understand how numbers work!

Well, ends up we were both right. The DieHard 94R fits in the battery box perfectly (I knew it would -I measured it) but the height is a bit of a problem. The factory front half of the battery cover doesn't fit right due to the height of the positive terminal clamp bolt.

Ford didn't want to replace the battery because they have a $39.99 battery replacement service, well, the battery in the Escape takes about an hour to change and their hourly labor rate is over $100/hr at my local Ford Svc. Dept., so they would lose money on that deal. They used the "it won't fit" as an excuse when they really meant "we dont' want to replace it because it takes longer to replace and we'll lose money on the labor charge".

Basically, as the OP and others have said, any 94R will fit in the battery box, but my particular DieHard has slighter higher terminal posts than most. Once I replaced the battery I used a bit of brute force to get the front half cover on it and made a nice crack in the cover! It looks like using the DieHard battery causes the terminal clamp bolt to be about 3/8" taller than the cover allows. So, caveat emptor!

Here's my battery and cracked cover:
 

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The factory front half of the battery cover doesn't fit right due to the height of the positive terminal clamp bolt.

Basically, as the OP and others have said, any 94R will fit in the battery box, but my particular DieHard has slighter higher terminal posts than most. Once I replaced the battery I used a bit of brute force to get the front half cover on it and made a nice crack in the cover! It looks like using the DieHard battery causes the terminal clamp bolt to be about 3/8" taller than the cover allows. So, caveat emptor!

Here's my battery and cracked cover:
Unfortunately, it's a bit late for you, but one could cut the upper end of the terminal bolt off to fix that problem. It doesn't need to stick up past the nut at all to hold the clamp on. Doesn't everyone have a Sawzall? :D


As for resetting the BCM battery monitor, take a look at AutoEnginuity, a program and dongle that run on a laptop. You need to buy the Ford Enhanced Bundle for about $360 (AutoEnginuity Total Ford Enhanced Bundle - Riffraff Diesel Performance), and you'll be able to do nearly everything that Ford's scan tool will do.
 
Tools/parts needed: 10 mm crescent wrench, 10 mm & 13 mm sockets/wrench, replacement battery (see discussion for size) and a cold beer

Approximate time required: 30 min

Quick discussion about batteries: All of the 2013 Escapes come standard with a size 96R battery. It's one of the smallest batteries (in terms of cranking amps, reserve capacity, & weight) that you can get [I'm referencing the Duracell Automotive Battery spec sheet - these are the batteries sold at Sam's club].



In other words, the stock battery sucks. I assume Ford was saving some money with the 96R battery, but the good news is that the battery tray can accept a larger battery without any cutting, drilling, or any other permanent modifications. And who doesn't want more cranking amps and reserve capacity? Especially if you run a lot of accessories (remote start, tow, lights etc.)

So how big can I go?? The simple answer is that a size 94R (H7) fits without any trouble. See the pictures below for the relative size comparison. I'm using an AGM battery, but a normal flooded battery should fit just the same.




Battery removal/replacement:

1. Turn off the car and and prop the hood open. Locate the battery cover and air intake which houses the air filter. Remove the battery cover and disconnect the positive wire using a 10 mm wrench. Pop open the air intake as if you were replacing the air filter, but don't remove the air filter. Just disconnect the wire plugged in at the top and move the cover to the left so it's out of the way. (The plug is easily removed by pushing the red plastic piece back with your finger nail about a quarter inch, then pull the entire plug backwards.)



With the air intake out of the way, you should be able to access the 4 black plastic plugs (green arrows in the picture). Pull all four of these plugs out. Now you should be able to lift the front cover of the battery tray about 1 inch so that it has some free movement. With the cover lifted up about 1 inch, you should be able to access the two wires that are attached on the bottom left of the cover (red arrows in the picture). Use a 10 mm socket and a 13 mm socket to remove the nuts and then slide the wires off. I've already removed the 10 mm nut in the picture below. Don't drop the 13 mm nut; it's not attached to the wire like the 10 mm one!



Now you should be able to move the battery tray front cover out the way to the right like this:



Before we can move the battery, we need to loosen the clamp holding it down. Remove the two nuts that are holding the metal clamp (green arrows in pciture). The bar can then be lifted off the bolts.



Pull the battery forward and lift it over the edge of the tray. Don't worry, the negative wire should be long enough, but keep an eye on the small wire plugged into the negative terminal (green arrow in picture). Don't put excessive tension on this small wire. Now you should have enough room to use your hand to unplug the small wire from the side of the negative terminal. With the small wire out of the way, the battery should come forward all the way, and you can use a 10 mm wrench to remove the negative terminal.





Remove the old battery from the vehicle.

The empty battery tray should look like this. Note the two plastic adapters that Ford added to accommodate the smaller battery (green arrows). Remove both of these plastic pieces. The rear piece easily pops out by hand. The piece in the front needs to be gently pried upwards.




Congratulations! Now your Ford Escape can accept a "real" battery.



Now get your replacement battery and essentially reverse the process. If you are using the larger 94R (H7) size battery, you may need to remove the handles if it has any so that the metal battery clamp can fit nicely in the center groove. I've included more pictures below of the new battery being installed.







Now that you're finished, you can relax and enjoy the cold beer.

Great write up!!! However, one word of caution, I was always taught to remove the negative cable first to avoid any chance of shorting the positive to ground when removing. Since you cannot remove the negative lead first, be extra careful removing the positive cable as you have the full amperage of the battery there (590 CCA). Just my $.02 cents.
 
Great write up!!! However, one word of caution, I was always taught to remove the negative cable first to avoid any chance of shorting the positive to ground when removing. Since you cannot remove the negative lead first, be extra careful removing the positive cable as you have the full amperage of the battery there (590 CCA). Just my $.02 cents.
You raise a great point, Joe.

Actually, it is recommended in the Workshop Manual that you remove the negative ground cable first as we have long been taught. This is accomplished by:

1) unbolt the black negative (ground) cable at the 'jump-start lug / battery negative ground' located to the right of the battery box; and
2) wrap electrical insulating tape over the all of the ground cable metal eyelet to ensure it does not touch any bodywork (prevent re-establishing ground).

THEN proceed to safely remove the positive lead and battery. Un-taping and reconnecting the negative cable to the jump-start lug should be the last step of battery re-installation.

Removal of the negative cable at the 'jump-start lug / battery negative ground' is the recommended procedure whenever it is desired to interrupt battery power to the vehicle systems (e.g. reset of various volatile memory modules or working on any "always hot" circuits); NOT disconnect of the positive battery cable.


It is never fun to weld a wrench to a positive battery lug and in the process let the very expensive 'magic smoke' escape from your vehicle electrical components
:eek:
 
Slow cranking

My 2013 Escape 2.0 had a tough time during zero temps keeping a full charge. We went to Florida for 2 weeks and took my Jeep Grand Cherokee to leave at the Boston airport. Good thing, because when we got home, the Escape was dead as a door nail. I could not see anything that could have caused a elec drawdown other the the alarm was set. Jump started it and let it charge up. But even after a few more cold days it cranks rather slow. I think the battery is not up to speed with so many cold nights. I would like to replace with the larger battery, but sounds like the Ford dealers are not set up to do that? Do they offer a larger battery yet? Has anyone had Sears change their battery with the Diehard?
 
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