PowerSurge Batts?

[Valhalla 8]

I came across Powersurge batteries on the net and after reading over the page and talking to the owner they seem to be pretty legit batts. Im posting this because I want to hear from people who have used them, knows someone who has used them and so on. What do you think of these batts? Legit? Pros? Cons?

[shizzzon 461]

they are slightly more expensive than XS Power batteries, they also float at 13.8v...

If someone can tell me for sure what are these batteries required charging voltage, i will be pleased.