In a message dated 10/18/2009 6:34:09 PM Central Daylight Time,
tr3driver@ca.rr.com writes:
> Something to keep in mind; small wire also has a significant resistance,
> which may affect your charger if you use a long enough length of it. For
> example, 24 AWG has about .025 ohms per foot, so a 20' length (40' total)
> would drop about 0.5 volts @ 500 ma. That doesn't sound like much, but
> it's
> more than the difference between a fully charged battery and a 50% charged
> battery (according to the table at
> http://www.batteryuniversity.com/partone-13.htm
All that will do is slow down the rate of charging. As the battery
approaches full charge the current will reduce and the drop in the line will
reduce. A fully charged battery will draw little current and any current will
exceed the self discharge rate. Besides, these are "Battery Tenders" intended
to keep a charged battery charged. If you want to charge a discharged
battery you need to use something else. In the industry parlance it is a
"Float"
charger.
Powersonic has a good technical manual on batteries:
http://www.power-sonic.com/index.php?id=42
Dave
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