Re: koolatron 12v cooler drain my battery

lbbs wrote:
> I saw koolatron 12v cooler for the road.   Just wondering how many hours can
> you run on the battery before it could be damaging effect on the battery.

I did a quick websearch and it seems it uses 3 amps (36 watts).
A typical car battery ranges from 50 to 100 amp-hours of storage.
Most of these batteries can be damaged by draining them more than
80%. For a small battery this would be 40 amp-hours or about
13 hours. This is only for a brand new battery. An old battery
will have less capacity.

You should note that these things only go a maximum of 40 deg
below ambient temperature. This means if it's 110 outside that
the cooler will only be 70 deg. The inside of a car, especially
one parked in the sun, can often be over 150 degrees.

Anthony