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Discussion Starter #1
Yup my Deka ETX15L battery wont take a charge and its only around 8 months old. Anyone else had this problem?

Im not going to bash deka or the retailer as I realize I could have gotten a bad battery. the bike is stored in my heated garage and was on a battery tender some over the winter. just wondering if anyone else had this problem or any info about possible causes other than just a battery.
 

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Could be a bad battery. Seeing as it's under a year old you hopefully still have warranty?

I haven't had any problems with my Deka. I top it once a month in the winter off season and it usually hit's full charge in less than an hour. I do vaguely recall reading once that leaving an AGM battery on a maintainer will kill the battery. I have no idea if it's true or not though, I just remember this coming up once before and the fellow had left it on a maintainer for an extended time.

Again, hoping you still have valid warranty, that would at least save you replacement cost!
 

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Discussion Starter #3
Could be a bad battery. Seeing as it's under a year old you hopefully still have warranty?

I haven't had any problems with my Deka. I top it once a month in the winter off season and it usually hit's full charge in less than an hour. I do vaguely recall reading once that leaving an AGM battery on a maintainer will kill the battery. I have no idea if it's true or not though, I just remember this coming up once before and the fellow had left it on a maintainer for an extended time.

Again, hoping you still have valid warranty, that would at least save you replacement cost!
Well I hope I just got a bad battery! I have heard a lot of good things from people running these batteries but mine didn't last through the 1 year warranty. a friend bought the battery off of a website and he is trying to get all the info and check on getting it covered by warranty. all that being said I really do wonder if the maintainer cooked it! seeing I kept the battery tender on it a pretty good bit over the winter. so I guess the question now is if anyone else has lost an AGM battery that was on a maintainer for some time. I thought that was the purpose of the battery tender but I guess it could work different with AGM batteries.

if it don't get replaced under warranty I will still probably try another one just because I hear they are great from lots of people running them, possibly just operator error that cause this one to cook or maybe a bad battery tender.
 

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I've had Dekas in 4 bikes and no issues yet. I bought 3 of them online for convenience. The last one, I needed a battery that day and luckily found a Deka dealer nearby. I plan to buy them locally in the future partially because of warranty if needed. I'd guess you just got a bad one. Hope you get it worked out. :thumb:
 

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Discussion Starter #5
I've had Dekas in 4 bikes and no issues yet. I bought 3 of them online for convenience. The last one, I needed a battery that day and luckily found a Deka dealer nearby. I plan to buy them locally in the future partially because of warranty if needed. I'd guess you just got a bad one. Hope you get it worked out. :thumb:
I am going to order a new one and try again. this time it won't sit on a battery tender all the time in the colder months. well see what happens.
 

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I can't say it did or didn't cause your problem, but I don't see any point in leaving any kind of tender or trickle charger continuously looked up to a battery for long periods of time. If nothing else, having anything plugged in unattended, even a coffee maker in your kitchen, is a potential fire hazard. That's my Fire Safety speech for the day.

My unsolicited recommendation, from a standpoint of safety only and not function, is to just hook up a Tender once a month or even every 2 weeks if that suits you, but just get the battery topped off then disconnect everything. The BT will shut off and on by itself, but you've still got everything plugged into an outlet. You have to keep a refrigerator plugged in, but you don't have to keep a battery tender plugged in.

I doubt it was the Battery Tender (if a true Battery Tender unit) that ruined the battery, but instead you just got a lemon battery as to me the second scenario is much more likely.

I have no proof that a "smart" charger won't ruin an AGM battery but am confident enough in my presumption that somebody would have to conduct some kind of test or study and prove to me that they will.

I'm not saying that BT is the be-all end-all of smart trickle chargers or that they are the only acceptable brand, but there are others I've seen that I wouldn't trust and I wonder how many people who claim a "trickle charger" or "battery tender" ruined their battery were using some kind of off-brand unit that is not of the same quality?

To the best of my knowledge, a "trickle charger" continously applies a charge to the battery while a "tender" monitors the battery charge and will shut off then it's reached a certain level then kick back on when it drops below that.

I think a lot of people hook up a trickle charger and leave it on for months and I do believe that will damage a battery.

Not saying that's what happened here, but I think it's part of the widespread opinion that a "tender" will damage a battery if left on too long.
 

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Discussion Starter #9
I can't say it did or didn't cause your problem, but I don't see any point in leaving any kind of tender or trickle charger continuously looked up to a battery for long periods of time. If nothing else, having anything plugged in unattended, even a coffee maker in your kitchen, is a potential fire hazard. That's my Fire Safety speech for the day.

My unsolicited recommendation, from a standpoint of safety only and not function, is to just hook up a Tender once a month or even every 2 weeks if that suits you, but just get the battery topped off then disconnect everything. The BT will shut off and on by itself, but you've still got everything plugged into an outlet. You have to keep a refrigerator plugged in, but you don't have to keep a battery tender plugged in.

I doubt it was the Battery Tender (if a true Battery Tender unit) that ruined the battery, but instead you just got a lemon battery as to me the second scenario is much more likely.

I have no proof that a "smart" charger won't ruin an AGM battery but am confident enough in my presumption that somebody would have to conduct some kind of test or study and prove to me that they will.

I'm not saying that BT is the be-all end-all of smart trickle chargers or that they are the only acceptable brand, but there are others I've seen that I wouldn't trust and I wonder how many people who claim a "trickle charger" or "battery tender" ruined their battery were using some kind of off-brand unit that is not of the same quality?

To the best of my knowledge, a "trickle charger" continously applies a charge to the battery while a "tender" monitors the battery charge and will shut off then it's reached a certain level then kick back on when it drops below that.

I think a lot of people hook up a trickle charger and leave it on for months and I do believe that will damage a battery.

Not saying that's what happened here, but I think it's part of the widespread opinion that a "tender" will damage a battery if left on too long.

I do have the (real) battery tender by brand name. I actually have 2, one I use on my klr and another on my gf's crf230. I doubt the battery tender was the problem with the exception of me keeping the battery tender on the bike all winter. the questions I had were, will the battery tender cook a mat gel type battery if left on the bike over winter? as I did! or did I possibly just get a bad battery? which I feel is what happened but no way to know for sure.

I went to advance auto today and picked up a autocraft etx15l,,, it is identical to the deka in every aspect but is stickered as autocraft, word is that it came out of the same factory as the deka and that the deka battery is sold and labeled as many different names, even though it is the same battery made in the same plant, place, ect. I installed it, it works great and the bike is for sure starting quicker. my plan is no battery tender at all till winter and then I will just top off the battery every 3 weeks or so. we will see how it works out.
 

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I think it's possible that a tender not designed for the specific charging needs of an AGM battery could (please note, could) fry an AGM battery, though I have no first hand knowledge of this other than what I've read.

I can say that I did not place my new last summer Deka AGM battery on a tender at all thru the winter, and it spun the KLR over just great today...having not been started since the first of January . That is supposed to be one of the big benefits of the AGM...an extremely slow self-discharge rate, so no tender needed during storage.
 
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