AGM batteries in my 5th wheel

I've four T-105s that give more power than the equivalent in Trojan AGMs at about 1/3 the price. Going AGM would have just been too expensive (the T-105s were NOT cheap either!). Even two will surprise you with what they can provide as these things are really the best deep cycle batteries around. I do have to check fluid levels once a month, but those things are so big they can loose a lot of it before the tops of the plates get dry. I'm using the same vent the 5er came with and everything's good.