Anyone have suggestions on Battery Back up?

[Lampshade]

I've been looking for a decent one, havn't seen the canadian tire on mentioned. Lots of Mods online that convert computer UPS's to long time ones using car battery's, that's what causes fires. Apperently it's safe if you use less than 50% the rating... but i still don't want to trust a house fire to that.

If i find anything i'll let you know, It'd be nice to have something for my return pump so that i can still cycle water.