Deep Cycle batteries will supply their rated output continously for an extended period over a starter battery and will be generally rated lower for a similar size/capacity as a result.
For lead acid it has to do with their construction.
For Li type I'm not sure how/if they control output, I would think they were slow(er) discharge by design.
Provided the rated output from these batteries is adequate (you need at least 300 amps, preferably 500-600), you can easily start a car with them (I've got a couple of those LiPo mini jump start packs for emergencies - they work great even with only having about 200 cranking amps (despite claims)).
My only concern would be accepting charge from the alternator - they pump quite a wallop energywise...
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Cheers
Marty
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Current:
2001 Audi S8 - Brilliant Black with Black interior, C5 RS6 rims (whenever I actually put them on...), Solar Sunroof, Tinted side and rear glass, RNS-D, Grom, Bose, clunky old phone in arm rest!
2002 Audi S8 - Project
Replacement head coming arrived  thanks to MJ
Silver with Black interior. All features as the '01, with the 'S' mode auto shifter. Dodgey rear tint (need to find a way to get rid of that).
Family:
2009 Volvo XC90 V8 R Design - has a louder more obnoxious exhaust than the S8, sounds great! Love this thing - Q7 was double the price, and certainly not double the car!
Sold:
1997 Audi A4 - Hamilton's Club Sport, Achat Grey (will miss the old girl)
Last edited by 27litres; 21st January 2017 at 08:52 PM.
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