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  #13  
Old 01-09-2014, 02:27 PM
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Re: Battery charger

uh oh. i have a company car and have not had the opportunity to drive my Jeep over the last 4 weeks or so. i put it on a regular 12v battery charger/tender that i've used for years. now i've discovered that I have this crazy AGM battery.

have i really destroyed my battery? damn!
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  #14  
Old 01-09-2014, 02:36 PM
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Re: Battery charger

A modern trickle charger, such as a Battery Tender, should work just fine and cause no problems with your AGM battery at all
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  #15  
Old 11-23-2015, 11:38 PM
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Re: Battery charger

I have a Battery Tender Plus and I'm curious, should the unit's clips be connected directly to the battery under the passenger seat or to the posts under the hood?
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  #16  
Old 11-26-2015, 09:31 AM
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Re: Battery charger

Quote:
Originally Posted by WK2Mosh View Post
I have a Battery Tender Plus and I'm curious, should the unit's clips be connected directly to the battery under the passenger seat or to the posts under the hood?
I have my Tender connected to the under hood posts - works great!
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  #17  
Old 11-26-2015, 11:49 AM
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Re: Battery charger

My BT is also connected to the underhood posts. When not hooked up, I just coil the pigtail and put it alongside the positive post.
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  #18  
Old 12-10-2015, 12:42 AM
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Re: Battery charger

AGM batteries have a very low self discharge rate, less than 2% a month. Unless you are going to let the vehicle sit for years, you do not need an external charger/maintainer. Mine sits for 5 months with no ill effects but I do disconnect the negative lead.
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  #19  
Old 08-23-2016, 04:31 PM
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Re: Battery charger

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Originally Posted by dons2346 View Post
AGM batteries have a very low self discharge rate, less than 2% a month. Unless you are going to let the vehicle sit for years, you do not need an external charger/maintainer. Mine sits for 5 months with no ill effects but I do disconnect the negative lead.
Hi after reading all the posts I have two questions:

1. I have an old model Ctek charger and wondering if that is compatible for my 2014 GC Ecodiesel and whether that may cause any damage to the AGM battery?

2. Would you recommend installing it at the cigarette lighter type power output that is located under the mid armrest between driver and passenger? Will it charge the battery thru that spot, or do I need to connect the battery charger directly to the battery itself underneath the passenger seat?
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  #20  
Old 08-23-2016, 04:56 PM
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Re: Battery charger

Quote:
Originally Posted by dons2346 View Post
AGM batteries have a very low self discharge rate, less than 2% a month. Unless you are going to let the vehicle sit for years, you do not need an external charger/maintainer. Mine sits for 5 months with no ill effects but I do disconnect the negative lead.
Unless you disconnect the battery, there is always some drain in modern vehicles.. Self-discharge isn't really the problem here.. A tender makes up for this drain.

From the '14 Owner's Manusl:
Quote:
If you are leaving your vehicle dormant for more than
21 days you may want to take steps to protect your
battery.
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  #21  
Old 08-23-2016, 05:47 PM
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Re: Battery charger

Quote:
Originally Posted by Scapie4 View Post
Hi after reading all the posts I have two questions:

1. I have an old model Ctek charger and wondering if that is compatible for my 2014 GC Ecodiesel and whether that may cause any damage to the AGM battery?

2. Would you recommend installing it at the cigarette lighter type power output that is located under the mid armrest between driver and passenger? Will it charge the battery thru that spot, or do I need to connect the battery charger directly to the battery itself underneath the passenger seat?
See link: Jeep Grand Cherokee WK2 - AGM Battery

There is a jumper/charger under the hood on the right side. Remote terminals so you won't have to go through the under seat compartment.

Here's a free Owners Manual: http://www.wk2jeeps.com/manuals/2014...manual_9th.pdf
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  #22  
Old 08-24-2016, 04:46 AM
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Re: Battery charger

Quote:
Originally Posted by Governor View Post
See link: Jeep Grand Cherokee WK2 - AGM Battery

There is a jumper/charger under the hood on the right side. Remote terminals so you won't have to go through the under seat compartment.

Here's a free Owners Manual: http://www.wk2jeeps.com/manuals/2014...manual_9th.pdf
Many thanks, much appreciated the feedback.
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  #23  
Old 08-24-2016, 11:18 PM
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Re: Battery charger

Probably your "old" Ctec charger would not hurt the AGM battery but I wouldn't chance it. That charger would be fine for a short period just to bring a dead battery back to life so that the alternator could take over. It depends on how long you will leave the vehicle dormant whether or not you need an external charger. This past winter, I left the '14 GC battery connected from the first of November until late April without any ill effects. Usually I disconnect it but this year I forgot. If you put the vehicle to bed with a fully charged battery and disconnect it, it will only discharge about 2% a month.
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  #24  
Old 08-26-2016, 09:16 AM
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Re: Battery charger

I use the Battery Tender Plus and have for years. The motorcycles have a multi bank charger attached to them and the Jeep gets it's own (because of where it is in the garage). Most motorcycle batteries are AGM, although the race bikes I have use the Lithium Iron to save weight.
For the Jeep, I charge it right through the center armrest port. That way I don't forget to unplug it as I drive away.
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