piclist 2008\07\30\230743a >
Thread: Why do car batteries go dead?
face BY : Herbert Graf email (remove spam text)

On Thu, 2008-07-31 at 15:00 +1200, Apptech wrote:
> > Car batteries are optimized for large startup currents
> > during cold
> > weather. Internal leakage is not a very important issue
> > when they are
> > designed.
> However, SLA batteries have very good shelf lives compared
> to eg NiCd and conventional NimH. Recent NimH developments
> have improved on this. A good SLA will have useable charge
> at 1 year (?20%+?)

You're right, a GOOD SLA will do pretty well.

Car batteries don't. I know that in colder weather after say only 2
months most car batteries I've tried can no longer start the car.

In warmer weather I'm sure the interval is much longer.

Note this is all based on personal experience, "the numbers" may say


<1217473662.518.10.camel@E2140> 7bit

In reply to: <059501c8f2b9$8d446340$e701a8c0@y2k>
See also: www.piclist.com/techref/power/batterys.htm?key=batteries
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Subject (change) Why do car batteries go dead?

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