"Smithers" Yes, Smithers is not my real name. wrote in message
. ..
Harry,
Why don't you just use the built in battery, and then recharge it when you
get home from your day of boating?


"Harry Krause" wrote in message
...
I just got in DeLorme's new Street Atlas 2006 with the GPS puck for my
laptop, and I'm going to order some inexpensive NAV software right after
the first of the year. My current laptop is a four year old IBM T23, which
has been more than sufficient for my use while traveling. It has a 12V
"cigar lighter" adapter/inverter box, which I have used without incident
on cars and boats. I'm assuming this device is sufficent to "clean" that
raw boat battery power so I don't fry the laptop. I haven't had any
problems with 12V power glitches so far, but I don't know if I'm walking
on the wild side here.




Smithers, laptop batteries may give you 3 hours or so of power. You would
need to plug it into a reliable power source when out boating.

Harry, I would think that you would be OK using the boat battery if you
never had problems using the car battery.