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I am a registered batteryholic.
I currently have:
7 yr old stock Bosch battery that still holds a charge 40 lbs $120ish
Deka motorsport AGM battery- 17 lbs $89
Odyssey PC680 AGM battery- 15 lbs $114
Shorai LFX36 Lithium Iron battery- 5 lbs- $300
All batteries start the car easily. The lead acid Bosch is the least vulnerable to overcharging and has by far the best reserve power. The 2 AGM are in the middle with the Deka offering better starting amps. The Shorai requires special care and feeding with a proprietary charging system. It is very light and works well. Pick your poison.
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2009 Cayman 2.9L PDK (with a few tweaks)
PCA-GPX Chief Driving Instructor-Ret.
Last edited by Topless; 04-14-2014 at 08:22 PM.
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