I was doing some research to see what is the most cost effective way to shave the battery weight down to about 15lb and be able to use the car once or twice each week without swapping out the battery ar having it sit constantly on a battery tender.

After reading the posts here and on other forums it all came down to two batteries: Deka EXT20L and Odyssey PC680MJ. Both have almost identical performance specs. I could find plenty of posts on Odyssey, but Deka seems to be more mentioned in these forums, since Braile repackages them at 3X the price.

Deka $90 shipped
Odyssey $155 shipped

What are your thoughts about either?

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'07 Porsche Cayman S: de-snorked... more mods to come. '05 Dodge Magnum RT: catback, high-flow cats, custom intake, projector headlights, SC FlashPaq... and on and on.
Blog: leanstartups.com

I have an Odyssey ... I think its the 929 or 925 and its fantastic.

I think you could expect pretty similar performance from either one based on their specs, so all things being equal except price . . . ?

I don't know about the Odyssey, but you have to buy SAE adapters for the Deka (but that's only another $10-12) - so for $50-60 savings, I'd go with the Deka.

I would still recommend keeping a charger handy if you plan to go more than a week or 2 without running it, particularly in cold weather, because I still don't think they have nearly the reserve of the OEM.

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All-season capability is what matters to me. Now we already know Braille rebrands Deka and sells for 3X the price. I can't figure out if Odyssey is guilty of the same or are they just using better materials, hence the higher price.

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'07 Porsche Cayman S: de-snorked... more mods to come. '05 Dodge Magnum RT: catback, high-flow cats, custom intake, projector headlights, SC FlashPaq... and on and on.
Blog: leanstartups.com

Any other feedback re. Deka or Odyssey?

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'07 Porsche Cayman S: de-snorked... more mods to come. '05 Dodge Magnum RT: catback, high-flow cats, custom intake, projector headlights, SC FlashPaq... and on and on.
Blog: leanstartups.com

Has anyone thought about when to replace the battery before the normal life runs out and the dreaded day when nothing works happens. I have a 2006, would guess the battery life is between 3 and 4 years max so in 1010 a replacement is on the chart, anyone agree or have any other thoughts?