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Old 1 Week Ago   #16
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Re: Battery

Quote Originally Posted by oyumurtaci View Post
Things to consider when selecting a battery for a start/stop equipped vehicle:

Lead acid or calcium batteries simply don't pack the punch required for the SS system. They have good instant current but fail prematurely with quick cycles between charging and discharging.

Lithium batteries are lighter and fare better to charging and discharging compared to traditional batteries, but don't do well with frequent high-amp discharges (namely, the Start part of start/stop) as it degrades the cells much quicker.

Glass mat and 'enhanced' flood (acid) batteries are usually the best compromise, but can be quite costly due to them being relatively new and not gaining much traction over lithium.

All in all, I'd say the costs of s/s in the long run far outweigh the fuel and environmental benefits of using it in the first place as having to prematurely replace a battery carries far greater environmental impact (and cost) than the few drops of fuel it saves at a stop light only after the car has warmed up in the first place.

This has to be the most convoluted way of saying ďa car with stop start needs a stop start batteryĒ

There are a few (VERY) expensive lithium batteries for cars but they are for lightweight motor racing applications rather than normal cars, and generally have low power output to start a car a couple of times during a race if needed, certainly not something any normal person would fit or even consider.

There are normal lead acid batteries for normal cars, and glass mat type batteries are specified for all cars with stop start.

These systems are not fitted for your or my benefit, they are purely there to get a car through emissions standards testing. Some cars like the 500 Abarth didnít even bother with stop start as the emissions where already high, it wasnít worth the cost of fitting stop start, it wouldnít have made much of a difference.
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Old 1 Week Ago   #17
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Re: Battery

Quote Originally Posted by murphyv310 View Post
Can't see how its possible to use a lithium battery on a system that's designed for lead acid!!
They are totally different technologies.

Stop start is nonsense in my mind and just a ploy for emissions

Youíre right, lithium batteries are not used for normal car batteries, they cost far too much and lack the punch in the small sizes used for car batteries.

Stop start is not a ploy. Itís not pretending to be anything else. It is 100% for emissions and not for the benefit of the owners of the cars, it is just to get the car through testing. In the real word when you generally donít stop for more than 10-20 seconds the amount of fuel saved is negligible. It only really comes into play when you sit in stationary traffic for an hour, but youíd probably want some heating or aircon depending on the time of year so most would override it.

The Fiat stop start system is ridiculously fragile. If I turn everything off in my Punto it will last a little under 3 minutes before restarting which is not far off manufacturers specs, where as, turn on the lights, fan, aircon, vanity mirror and it will panic and restart the car after a few seconds.

Virtually every other car Iíve own with stop start (3 minis and a vw) as well as the multitude Iíve driven have never had the problems fiat have, they all worked faultlessly and would cycle on and off without any problems only when called on.

The only time you found them restarting was after 4-5 minutes having parked up and not stopped the engine. The Punto wonít even activate stop start after youíve reversed into a parking space, thatís not a fault that designed into the system.
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Old 1 Week Ago   #18
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Re: Battery

Stop start lol when at the lights/junctions these hold traffic up as most who have it don't seem to be getting moving very quick. I'm usually way gone before they move
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Old 1 Week Ago   #19
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Re: Battery

Quote Originally Posted by sandeel999 View Post
Stop start lol when at the lights/junctions these hold traffic up as most who have it don't seem to be getting moving very quick. I'm usually way gone before they move
When S/S is working on the Panda it's ready as soon as you depress the clutch pedal so before you're in gear so there shouldn't be any delay.
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Old 4 Days Ago   #20
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Re: Battery

Quote Originally Posted by babbo_umbro View Post
When S/S is working on the Panda it's ready as soon as you depress the clutch pedal so before you're in gear so there shouldn't be any delay.
I'm talking about s/s in general, seems most are so slow at moving off from lights I'm usually gone before I hear their engine start. The system may work well but it seems most I see can't use it to get away
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Old 4 Days Ago   #21
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Re: Battery

Quote Originally Posted by babbo_umbro View Post
When S/S is working on the Panda it's ready as soon as you depress the clutch pedal so before you're in gear so there shouldn't be any delay.
I agree. S/S on my Panda TA works really well. Never had issues with it. For lights and level crossings it works as it should. I'm wondering if some of those with S/S issues (such as not deploying often or starting the car again after a matter of seconds) have batteries that are weak or not sufficiently charged.
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Old 4 Days Ago   #22
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Re: Battery

Quote Originally Posted by sandeel999 View Post
I'm talking about s/s in general, seems most are so slow at moving off from lights I'm usually gone before I hear their engine start. The system may work well but it seems most I see can't use it to get away
I agree that many drivers take an age to get under way, specially at traffic lights - I assumed it was just stupidity but it might be the increasing presence of S/S systems.
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Old 1 Day Ago   #23
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Re: Battery

Or mobile phones - when people think its OK for a sneaky check or text...
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