DIY battery backup

[Flatlandreefer]

Does anybody have a link to a good instructional post on how to build a deep cycle battery backup to power a powerhead in the event of a power outage?

 

[Pet Detective]

I would post this in the "Do It Yourself" forum, sorry I have no idea how to do that.

 

[Indymann99]

Doing a search in the DIY section will net you lots of options.