Odyssey Battery Users

[flightlead404]

My boat anchor battery is on its last legs and I'm considering the Odyssey 680 or 925.

I have a few questions for those that use them

1) Are these two still the best choices for reliability, cranking performance, and fitment?
2) Is there a particular model of 925 or simply use the base 925 with the automotive post screw in terminals?
3) Any different in fitment between the Rennline and Odyssey mount/hold downs?
4) I was considering the Rennline mount with the extra tab for a battery switch as I thought I could use this as a mount for an eventual inertia switch for the fuel pumps should I eventually go full EFI, thoughts?
5) It looks like the batteries might both leave enough room to mount a small aux fuse panel for some additional gear I have installed (front oil cooler fan, upgraded headlights etc) does anyone have experience with this?

[930zen]

Flight:
1. I have a 925 that is two years old and it has served me well. In the winter I might let sit for several weeks unattended with no issues. Cranking performance: I use Driven DT 50 15W-50 and my garage stays around 60-75 degrees. Figment is great in that the footprint is much smaller than a traditional configuration - even with mounting hardware.
2. The 925 model in my car uses screw in posts.
3. I have the Rennline and like the quality/weight and fitment.
4. The Rennline mount I have has the extra tab for batter switch and the switch is installed. I do think you would have residual space for other auxiliary items in the battery area.
5. I have also installed cooler fan and upgraded headlights - and Motec EFI. However, I have not co-located in the battery box.

If you want (If it ever stops raining!) I can drive to the office (Galleria) some time next week and you can look at the setup and see what you think. Let me know.

[slow&rusty]

PC680 all the way! I swear by them and get an easy 5 years out of one.

[tops911]

I have a 925 battery (that must be something like 11 years old) in it's second Porsche. First in a 78 SC that i used the Rennline "smugglers box" mount with the kill switch. now it is in my 82 930 with a Rennline mount in the normal place ( this car has AC) with the kill switch. I like the "kill switch" to disconnect the battery if parked for an extended time to prevent battery drain. never an issue with the battery, i do keep it on a battery maintainer. Rennline is good stuff.

[1979-930]

I go with the 925 for the extra reserve.
I had issues with the 680 in another car going dead all the time. But that was a modern car with efi, gem module and items that have a small draw all the time. The 680 would probably be fine in a non efi car like the 930. But the extra 8.4lbs savings for half the reserve capacity isn't worth it for me.

[JacobS911]

pc680 here! Great battery. I do bring it inside in the winter to keep it warm.. fires right up after sitting for a month or 2 as well.

[flightlead404]

Originally Posted by 930zen

Flight:
1. I have a 925 that is two years old and it has served me well. In the winter I might let sit for several weeks unattended with no issues. Cranking performance: I use Driven DT 50 15W-50 and my garage stays around 60-75 degrees. Figment is great in that the footprint is much smaller than a traditional configuration - even with mounting hardware.
2. The 925 model in my car uses screw in posts.
3. I have the Rennline and like the quality/weight and fitment.
4. The Rennline mount I have has the extra tab for batter switch and the switch is installed. I do think you would have residual space for other auxiliary items in the battery area.
5. I have also installed cooler fan and upgraded headlights - and Motec EFI. However, I have not co-located in the battery box.

If you want (If it ever stops raining!) I can drive to the office (Galleria) some time next week and you can look at the setup and see what you think. Let me know.

That would be great! I'm in midtown. Lets do a turbo lunch next week if the wx is good. I'd be avail wed-fri

[Funracer]

Considering a 925L myself. The “L” means this version has the negative and positive poles are reversed so you can turn the battery around and attach the leads on the inside edge.

[T77911S]

you can buy a standard battery that will fit the 930, not like the massive battey it calls for.

there are 2 sets of holes in the pan for bolting it in.

I have a red top only because it was free.
I had to make a metal bracket to bolt it down. nothing fancy.

[Ollies930]

Interestingly, on their website the PC625 looks to be a more powerful and yet smaller/lighter than the PC680. I wonder if that is a mistake or if the design/architecture of the PC625 battery promotes greater efficiency?

[slow&rusty]

Good looking out Ollie, I had no idea there was a 625.

[flightlead404]

Originally Posted by 930zen

If you want (If it ever stops raining!) I can drive to the office (Galleria) some time next week and you can look at the setup and see what you think. Let me know.

PM'd you

[slow&rusty]

Hey guys - I wanted to provide an update to this thread.

A coupe of nights ago, I decided to take my car out for a drive and blow out the cobwebs. Low and behold the PC680 was dead (even though I keep it on a NoCo tender) and even though it is just over two years old.

Looking at replacements online the cheapest PC680 or PC625 replacements I found were as low as $125 to $140 (plus another $10-$15 for shipping). I felt hard spending that kind of money and wanted to look at other wallet friendly options with equal or better performance.

I recently had success using "regular" ETX batteries from my local O'Reillys / Checkers parts store. The ETX20 has a nearly identical case to the PC680 and also has the identical weight but has almost double the cold cranking amps as the PC680 (170CCA vs 310CCA), another advantage is price. The ETX20L (with a $10 battery core deposit) and my small O'Reillys discount plus tax I paid $96 out the door, so quite a bit cheaper than the PC680 plus very available at nearly all parts stores.

I have a Rennline PC680 mount in my car that only required a small amount of slotting to the holes in the top plate (5 minutes) and placing a thin rubber based below the ETX20L as it is a little shorter than the PC680, to get it to the "right" height so it does not move once in place. All in all a successful new installation and excellent option to the PC680.

And some pictures!
Compared:










Old PC680, getting ready to come out


ETX20L installed:


Regards,
Yasin

[Fever]

I had have bad experience with these batteres , i have had two 1200 Odysseys they havent last much, so I just went to a std battery type for the car, ni issues.

[turbodave930]

PC680 was great when it was warm. I had it mounted in the smugglers box. Eventually developed an issue where the car wouldn't actually get spark till I stopped cranking. So, I would crank and let off the key and it would fire to life. Strange. Gave up on it and installed a standard battery in the same location. All is good now.