Downriggers are used for trolling. If you are trolling, your engine is
running. If your engine is running it is charging the battery. Why do you
want a separate battery? If you're using the kicker and it doesn't have a
charging system then a separate battery might be wise and will only last
according to how many times you bring in your gear!
Gordon
"JJ" wrote in message
...
Hi again. I am installing 2 downriggers on my boat. I want to run them on
a
separate battery. They draw 7amps each. What kind of battery do I need
for
a full day of fishing ? Would a portable power pack (33 ah deep cycle)
work
?

Thanks again for all the help.

JJ