Why do car batteries go dead?
Herbert Graf email (remove spam text)
On Thu, 2008-07-31 at 02:54 +0100, TomÃ¡s Ã“ hÃ‰ilidhe wrote:
> It's common knowledge that if a car's left sitting for a few months, the
> battery will be dead when you go out and try start it.
> Assuming no current's being drawn from the battery (because the
> circuit's broken), does anyone know why it goes dead?
Batteries have internal leakage currents, they will self discharge no
Leave any battery long enough and it'll be empty.
Car batteries are optimized for large startup currents during cold
weather. Internal leakage is not a very important issue when they are
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See also: www.piclist.com/techref/power/batterys.htm?key=batteries
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