The BatteriesPlus store where I bought my Trojan T105's some years ago, according to their website, now sells Duracell Ultra FLA batteries as replacements. Does anyone have experience with these batteries? I am looking at their SLIGC115 230Ah model. I have 5 strings of 4, in a 24volt battery bank. What do you recommend? If I buy these, I go pick them up and don't have to deal with shipping.