2014+ Jeep Cherokee Forums banner
21 - 40 of 68 Posts

Registered
Joined
11,162 Posts
Oh and something else to add... Just 10 days ago, a member stopped by the forum reporting a similar issue : Jeep dealership said battery tested 'good', but one of their techs told the customer it would be a good idea to replace the 'good battery' with a new battery, because from his experience test results with the GR8 tester were not reliable for a Cherokee battery. Tech was right, new battery in and ESS worked flawlessly :


..and the conclusion :
 
  • Like
Reactions: tasdisr

Registered
Joined
72 Posts
Discussion Starter · #23 ·
Well not much to report. Took the Cherokee to two different Batteries + today. For some reason neither could give me a print out of the results, but both said the test showed the battery still within parameters and the load test was fine also. (I guess I could have asked and written the results down, but just was too lazy I guess)

Right now I have it hooked up to a charger to see what happens.
 

Registered
Joined
11,162 Posts
Well not much to report. Took the Cherokee to two different Batteries + today. For some reason neither could give me a print out of the results, but both said the test showed the battery still within parameters and the load test was fine also. (I guess I could have asked and written the results down, but just was too lazy I guess)

Right now I have it hooked up to a charger to see what happens.
Ok... we'll have to do without test results.

Charging should help. If it doesn't, there might be another problem, (than he battery). Depending on your charger's output, plan on hooking it up for a good 12 hours, or more if you can. What type of charger is it ?
 

Registered
Joined
11,162 Posts
  • Like
Reactions: tasdisr

Registered
Joined
72 Posts
Discussion Starter · #27 ·
That's a decent charger. Do leave it on for at least 12 hours. Let us know tomorrow how ESS behaves and also if the Battery Tender shows 'Fully charged'.
It has been on for around two hours. I may take it off before I go to bed around 11 or just leave it on overnight.
 

Registered
Joined
3,277 Posts
Info for a 2014 V6 Trailhawk which when stock uses a flooded battery, I am using an X2 Power. (Does not have ESS).

Went to my local Batteries+Bulbs eleven days ago and their new battery tester does not provide battery "STATE OF HEALTH".
So I'll just get my battery tested at AAA Car Care which does. (Get it tested about 5 times a year.)
My X2 Power battery is a little over 3 years old and measures 795 CCA. (Rated at 840 CCA)
So the battery is getting worn out. Rumor has it that when the battery gets down to 450 CCA it should be replaced. (assuming it even lasts that long)
When my Odessey battery was replaced it was "APPROACHING THE END OF ITS USEFUL LIFE" and measured 660 CCA (Rated at 730 CCA)
I'm not sure I want to use CCAs as the measurement to indicate a worn out battery.
"STATE OF HEALTH" seems to be more accurate.

Bought a NOCO BOOST XL GB50 to jump start vehicles.
Emailed their Support Specialist and confirmed the BOOST line of jump starters WILL work on AGM batteries.
 

Registered
Joined
11,162 Posts
It has been on for around two hours. I may take it off before I go to bed around 11 or just leave it on overnight.
These chargers are "smart" and can be hooked up for long periods of time. As in months... haha. They will not overcharge your battery.
 

Registered
Joined
875 Posts
It has been on for around two hours. I may take it off before I go to bed around 11 or just leave it on overnight.
Leave it on overnight at the very least. Battery maintainers like yours are designed to be used for days/weeks/months at a time. It won't overcharge or hurt your battery in any way. In fact, it is good for your battery.
 

Registered
Joined
875 Posts
Info for a 2014 V6 Trailhawk which when stock uses a flooded battery, I am using an X2 Power. (Does not have ESS).

Went to my local Batteries+Bulbs eleven days ago and their new battery tester does not provide battery "STATE OF HEALTH".
So I'll just get my battery tested at AAA Car Care which does. (Get it tested about 5 times a year.)
My X2 Power battery is a little over 3 years old and measures 795 CCA. (Rated at 840 CCA)
So the battery is getting worn out. Rumor has it that when the battery gets down to 450 CCA it should be replaced. (assuming it even lasts that long)
When my Odessey battery was replaced it was "APPROACHING THE END OF ITS USEFUL LIFE" and measured 660 CCA (Rated at 730 CCA)
I'm not sure I want to use CCAs as the measurement to indicate a worn out battery.
"STATE OF HEALTH" seems to be more accurate.

Bought a NOCO BOOST XL GB50 to jump start vehicles.
Emailed their Support Specialist and confirmed the BOOST line of jump starters WILL work on AGM batteries.
Good with fractions? :)

 

Registered
Blackbird 2019_Limited_4x4 Blk_on_Blk Tech_Lux_Nav
Joined
1,796 Posts
I think the SoH above is the one that the KL is most sensitive to. These tests usually are best bench tested, where the testing equipment puts a load on the battery over several hours, and then attempts to bring the battery back to a full charge, simulating operating conditions. Ideally this equipment would have the 'as new' values of a particular battery for a baseline.
This is why the quick tests are more akin to taking a pulse, and the bench test is like an EKG.
 

Registered
Joined
11,162 Posts
I think the SoH above is the one that the KL is most sensitive to. These tests usually are best bench tested, where the testing equipment puts a load on the battery over several hours, and then attempts to bring the battery back to a full charge, simulating operating conditions. Ideally this equipment would have the 'as new' values of a particular battery for a baseline.
This is why the quick tests are more akin to taking a pulse, and the bench test is like an EKG.
I'm not very familiar with the GR8 machine, but I've seen it at work a bit and the battery goes through quite a few cycles, including a charge, it needed. In comparison, my small/cheapo Ancel tester gets you results in about a minute (SoC, SoH, CCA remaining, internal resistance, etc..). On paper, the GR8 wins. But we've seen quite a few reports here of GR8 saying 'good battery' only to have that battery replaced soon after, because SoH was insufficient for ESS to operate.
 

Registered
Blackbird 2019_Limited_4x4 Blk_on_Blk Tech_Lux_Nav
Joined
1,796 Posts
I'm not very familiar with the GR8 machine, but I've seen it at work a bit and the battery goes through quite a few cycles, including a charge, it needed. In comparison, my small/cheapo Ancel tester gets you results in about a minute (SoC, SoH, CCA remaining, internal resistance, etc..). On paper, the GR8 wins. But we've seen quite a few reports here of GR8 saying 'good battery' only to have that battery replaced soon after, because SoH was insufficient for ESS to operate.
I'm thinking that without the baseline data, is where these miss-report. Batteries+ (I'm not sure what device they used, I left the battery with them) had to run some test over several hours to determine that my original battery was "SoL"
Since it was their battery they were testing, they may have had the baseline/optimal values...
 

Registered
Joined
72 Posts
Discussion Starter · #36 ·
Okay, here is an update. I left the charger on overnight (charger was from 11am till 2pm today. Started the car and once it got up to operating temp the display read Start/Stop not ready but did not indicate the battery was charging.
 

Registered
Joined
11,162 Posts
Okay, here is an update. I left the charger on overnight (charger was from 11am till 2pm today. Started the car and once it got up to operating temp the display read Start/Stop not ready but did not indicate the battery was charging.
Thanks.

This simple 'Not Ready' message can mean many things, but 'normally' it goes away in a short period of time and ESS can work again. Drive the Jeep a bit and check the ESS status. If it absolutely refuses to come alive with no clear error message, then I'd suspect the IBS (intelligent battery sensor) could be faulty. This can checked at a dealership with their wiTECH machine.

Edit to add : did you drive the Jeep before you checked the ESS status ? If you only started the engine and did not move (and drive at more than 5mph), then ESS would not be activated.
 

Registered
Joined
11,162 Posts
Thanks.

This simple 'Not Ready' message can mean many things, but 'normally' it goes away in a short period of time and ESS can work again. Drive the Jeep a bit and check the ESS status. If it absolutely refuses to come alive with no clear error message, then I'd suspect the IBS (intelligent battery sensor) could be faulty. This can checked at a dealership with their wiTECH machine.

Edit to add : did you drive the Jeep before you checked the ESS status ? If you only started the engine and did not move (and drive at more than 5mph), then ESS would not be activated.
I did a late edit to my post, I don't think you saw it before you 'liked'. So my question : did the Jeep move before you checked the ESS status ? Thx.
 

Registered
Joined
72 Posts
Discussion Starter · #39 ·
I did a late edit to my post, I don't think you saw it before you 'liked'. So my question : did the Jeep move before you checked the ESS status ? Thx.
No, I did not drive it but I will be going out later today for a ride.
 

Registered
Joined
11,162 Posts
No, I did not drive it but I will be going out later today for a ride.
Ok that explains it. Jeep has to roll to get ESS to kick in. With a warmed up engine and rolling, you should have ESS back.
 
21 - 40 of 68 Posts
Top