@ dj-party: Yes, if it does what it says on the label, it should work. I assume the access-point takes 5V and non-ridiculous amount of current? Though, with 10A to play with, current really shouldn't be an issue.
@ Super-Nathan: I wouldn't recommend the LM340, or any other linear regulator for that matter, in this case. Sure, it will work ... for a certain value of "work". Assuming a nominally 12V lead-acid battery, that means ca. 14V during float charging, meaning a voltage drop of 9V across the regulator. If it is delivering the maximum 5A current, that means it has to burn off 45W in heat, while delivering 25W of usable power, i.e. ca. 36% efficiency! Compare with the claimed 90% efficiency of the switch-mode regulator (which I confess I have some doubts about, but not enough to really affect the argument). Also remember that you have to get rid of the waste heat, which for these kind of numbers means a big-ass heatsink and forced ventilation.
Best regards, Kári.