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  #1  
Old 24-12-15, 11:06
kano nordie kano nordie is offline
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Lithium battery info wanted

I have been a great believer in Odyssey batteries with their large cranking amps, being able to hold a charge for a long time and their long life.
How do lithium batteries compare, I know they are about 1/4 of the weight, but how do they compare on specs, Alan MacD will be along soon I expect?
John
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Old 24-12-15, 12:34
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jeffwiltshire jeffwiltshire is offline
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I replaced a PC680 with a Lithium Ion. Battery holds charge a lot longer and spins the engine over faster. Plus....1Kg verses 7Kg !
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Old 24-12-15, 14:05
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Nick Skidmore Nick Skidmore is offline
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My experience:-

CCA to weight Li wins every time but compare Ah to Lead acid and you see the flipside. In short if you have injection you will need an alternator or external charge between runs.

I will continue to use Li on both my cars but they will both have alternators as it's just a bit easier without a charge between runs.
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Old 24-12-15, 14:53
dan mason dan mason is online now
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I'm considering swapping to one but was also unsure if it would be hastle free or not
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Old 24-12-15, 15:42
powell powell is offline
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I use a li-on battery from Playskool on my Westfield. I was massively dubious about its ability to start my high compression x flow engine, Luke assured me that it would be fine and told me if I had any doubts after fitting it to just send it back but alas it has been faultless! Not once have I gone to the car and it not started and it weighs 800g! Without hesitation I would recommend fitting one.
Luke
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Old 24-12-15, 16:18
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andylaurence andylaurence is offline
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Just remember that lithium runs a higher voltage than lead acid. I'd you run a starter pack, it only takes one helpful person to plug your starter pack in early and your battery will be dead. Ask me how I know...
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Old 24-12-15, 17:08
Lolat492 Lolat492 is online now
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Interesting. I have a huge Red-Top battery in the Lola to churn the Porsche flat 6 over, weighs about 8Kg.
however, I also run a big alternator and the battery keeps up with all the hillclimbs for the year without any external help ever.

will one of these do the same?
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Old 24-12-15, 17:53
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jwhillracer jwhillracer is offline
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I've had one of Alan McD's little batteries in the 911 all season, and it hasn't missed a beat, without any external assistance.
0.8kg v 11kg
Cheap weight saving for a Porsche!

JW

Last edited by jwhillracer; 24-12-15 at 17:54. Reason: The last glass of red.........
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Old 24-12-15, 18:42
paul martin paul martin is offline
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I ran one in the OMS for the last few years and will order Li one for the lotus in the new year. Easy 8 kg saving.
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  #10  
Old 24-12-15, 20:37
No Imagination No Imagination is offline
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Quote:
Originally Posted by andylaurence View Post
Just remember that lithium runs a higher voltage than lead acid. I'd you run a starter pack, it only takes one helpful person to plug your starter pack in early and your battery will be dead. Ask me how I know...
The trick is to keep the on board battery and jump battery circuits completely separate, then the accidental discharge cannot happen.

As others have said above the problem with lithium batteries is the Ah rating when compared to a lead acid. I run an expensive Lithium which has >600 cranking amps (so equivalent of 25Ah for cranking but 10Ah for discharge), but just about maintains 12v for a run when running 8 injectors, 2 water pumps, 8 coils on plugs and a Bosch 044 fuel pump. As I don't want to run an alternator I just recharge between runs.
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