I am just sick of hard starts and a dead or weak batteries after a month of 3 day a week usage. I am sure i can live with the 10 additional pounds it weighs. I just bought the rennline battery mount. Now where to buy the battery for the right price? One of my vendors carries XSPower Batteries which actually seem to be a bit better/stronger and i get them next day free shipping. It seems that they are just a little bit larger than the PC925 which means it may not fit in the mount i just bought??

Here are my two questions: Where is the best place to buy a odyssey battery?

Has anyone here had a xs power battery? are they good or better than the odyssey batteries? TIA --Rob

 

I used the PC680 on my Supra for a 2-3 years and got tired of replacing the battery every 12 months. It would get to the point where I couldn't let the car sit for the weekend with out it needing to be jump started.

I never had this issue after moving to the PC925.

Later, Steve

 

Thats how i felt. If i drive the car 3 days a week the battery is fine for the summer however as the battery gets older or it gets colder out forget about it! Not a good feeling leaving your car parked and having a feeling that it may not start...

Should i get a 925 or 925T

 

What's the T?

 

I swapped my 680 for the PC925. I was sick of the dead batt

 

Took you guys awhile to see the light !
AWD, you have a shop account- open an account.

 

Don't recall that car having a PC680? I thought it was a Deka?

 

I used the 680 in a couple cars of mine. Bottom line is that it needs to have a battery tender on it whenever the car isn't being driven, or it just won't have enough juice to crank when you need it to eventually. I also switched to the 925, I still have a tender on it, but it's not nearly as necessary.

 

I'm pretty sure they are all the same. I have change the original out at least 3 times that i can remember.

 

Not so sure they are all the same. I seem to recall using a Deka. I only used that one because it was the cheapest and lightest...figuring it wouldn't last. I kept it on a battery tender for the 2 yrs I had it and it never left me stranded. I DID notice that when driving at night for extended periods (an hour or two?), the headlights and dash lights would dim a smidge. If it ever came time for a new battery I would sacrifice adding a few lbs for more CCA, much like you are doing now. Hope the car is well.

 

I run the PC925 in mine and has never failed on me to crank. However, the odyssey batteries, when charging, require special chargers that put out something over 14volts. It is higher than standard acid or AGM batteries. Odyssey has a list of approved chargers, and charging with anything else will only charge the battery to about 80%. This is a common misconception people have about using the odyssey batteries because they die quickly from under charging them.
see page 6 http://www.odysseybattery.com/docume...M-011_0213.pdf
here is the list of approved chargers that can charge the odyssey batteries http://www.odysseybattery.com/docume...ersOct2013.pdf

 

^True. I learned that lesson after having gone through 2x PC925s. Basically the more I float charged it with the wrong charger, the more I prematurely damaged the battery. Vitally important as I finally learned with their tech support.

Another important point is that the smaller the capacity of the battery, the more likely it will be degraded over the regular use of the battery. The problem is that no car battery likes to be deeply discharged (some types will tolerate it better than others). So the smaller the battery, the more deeply discharged percentage wise it gets (relative to a larger battery) every time the car is parked.

Example: Let's say a car parked over 3 days and uses 3 units worth of energy total. Comparing a small vs large battery that has 5 units and 10 units worth of energy respectively. The smaller battery would have discharged to 40% of its capacity ((5-3)/5) vs. the larger at 70% ((10-3)/10). Remember the part about car batteries not liking to be deeply discharged? That's why the smaller battery will degrade far more quickly in a similar usage scenario.

Another option if the goal is to have the least amount of weight on race day is to tandem up batteries. One strategy might be to have dual PC680s or dual PC925s for daily use, and to take one out on race day. Or a variation of one PC680 combined with one PC925. Or just swap batts. Float chargers listed by odyssey have no problem with these tandem configs.