"Joseph Meehan" wrote in message
.. .
You may want to consider that most, if not all, battery powered pumps
are lower volume than the standard pumps most people have. That means it
will need to run longer to do the same job.

My backup pump is about 1/2 has efficient (water removal wise) as my main
pump. Even in the worst conditions (since I've been here 3 years ago) my
main pump has never run more than about 15 seconds every 10 minutes or so.
So conditions would have to get MUCH worse for me to worry about backup
capacity.

-Tim