battery problems - odyssey 925

[BioBanker]

Thanks in advance

My new this spring Odyssey 925 is starting to crap out on me.

I have had no issues with this battery. Ive been able to leave the car with the alarm on for at least three days without issue without a tender and its fired right up.

It didnt start this AM after being left for about 30 hrs. I charged it up and went on my way. I just checked it again after having it sit for 7 hrs, and I was down to 65% charge (according to my charger).

The alternator is fine. Im showing 14+ volts on the meter when the car is running and the charger has an alternator check, and it seems okay from that too. I will confirm with my voltmeter.

I installed a nav system (kenwood monitor and gps) and Im pulling the power from the forward most terminal of the fuse box (HERE, labeled ACC. These issues are coming up since I installed this NAV. I didnt think that ACC has any power without the keys in the ignition. TRUE? My monitor goes off when the car turns off.

Do I have some dead cells in the battery? How would I know? How can I tell if this is a drainage issue or the battery is kaput?

TIA

 

[WingZ]

Thanks in advance

My new this spring Odyssey 925 is starting to crap out on me.

I have had no issues with this battery. Ive been able to leave the car with the alarm on for at least three days without issue without a tender and its fired right up.

It didnt start this AM after being left for about 30 hrs. I charged it up and went on my way. I just checked it again after having it sit for 7 hrs, and I was down to 65% charge (according to my charger).

The alternator is fine. Im showing 14+ volts on the meter when the car is running and the charger has an alternator check, and it seems okay from that too. I will confirm with my voltmeter.

I installed a nav system (kenwood monitor and gps) and Im pulling the power from the forward most terminal of the fuse box (HERE, labeled ACC. These issues are coming up since I installed this NAV. I didnt think that ACC has any power without the keys in the ignition. TRUE? My monitor goes off when the car turns off.

Do I have some dead cells in the battery? How would I know? How can I tell if this is a drainage issue or the battery is kaput?

TIA

I've got the 545 version. Got it from a guy on prime who kept having problems with it. I've had no problems at all. It drained once when I didn't start the car for about a month ,but that's it. I heard you mention you had these problems after you put in your nav. Did it possibly get drained while you were installing the system? These small batterys can't take the interior lights being left on for any amount of time.

 

[BioBanker]

The battery has been drained three times in the past month or so. The first time was when the car was getting work done and they had the doors open for an extended period. Then, as you suggested, when I installed the NAV (it seemed to drain very fast). And then yesterdays incident.

But I thought that these were deep cycle batteries ie. that they can be repeatedly drained and recharged without busting. Is that not correct? If draining them once will do them in, then Im sure the guys working on my car first did the damage.

How many times can you drain a battery like a 925 without breaking it? I thought it was in the hundreds.

 

[BioBanker]

The battery charges up fine, but seems to drain much faster than it would before.

With the alarm on, its draining at about 5% per hour. I have confirmed that there is no power to the NAV when the car is off.

 

[Malibu Rapper]

A lot of auto parts stores will do battery testing for free. Odyssey makes high quality batteries but it could just be that yours is dying. I believe they carry a 3 year full replacement warranty. The alarm uses an extremely low amount of current so 5% per hour is ridiculous, the battery sounds like it just doesn't have the capacity anymore.

 

[goldNSX]

I've heard of dead Odyssey's after too many deap cycles. To avoid this use a battery jogger/charger as soon as you leave her in the garage.

 

[nsxtasy]

My last PC925T lasted about nine years and was still working fine when I replaced it (just nervous about it being that old, for all I know it could have gone a lot longer).

How old is yours?

Have you measured the drain on your battery when the car is turned off? Maybe you have a short circuit or some electronic item on the car is not wired or functioning properly?

Did you try disconnecting the battery entirely, to see if it still drains at 5 percent per hour?

 

[BioBanker]

Ive not tried that Ken, but oddly, Ive moved the NAV power from the ACC terminal to the IGN terminal, and it SEEMS to be better, I left it 10 hrs and the battery was at 85% in the AM. If I have any more problems Ken, I will disconnnect the batt as you suggest. Good idea.

But who cares? I had an AWESOME day at the track.

 

[Tanto2]

You probably know this already but, I didn't see anyone ask you if you were using the proper charger or tender. While regular chargers will charge, just one time can cause sulfate build up that reduces the ability to come back from deep discharge. I had my charger die and used a std tender overnight just once. This almost new battery went belly up shortly. I'm still a little skeptical, but thats what the engineering folks told me. I have had excellent results with the 925 and a black panther before it(same battery). If memory serves the parasitic loss capability is 20% or so less. Get one of the new odyssey high amp chargers. You can tend with them and yet they will bring up a battery that won't start in about 10 minutes! Now thats nice. I did have to return the first unit though, it had the wrong software. Schumacher makes them and their quality could be better. Deltran no longer makes odyssey chargers.

 

[nsxtasy]

I've been charging mine for 16 years with an automatic battery charger that is not designed specifically for the PC925T or Black Panther. I think the key is to make sure it's the kind of charger that shuts off once the battery is fully charged.