who give a shit what are you running or sound devices gear , i just gave you an example for something that would work with these 40 bucks Chinese batteries you pointed about , gear that have much grater input dc tolerance .
and gave you the reason why not to use it with your preamp as you can find your self working in the aria in which your Apogee will start chocking since the input voltage is bellow what it needed .
about sla batteries , it is the worse for cold weather as you will loose allot of capacity if you use it outside and if you will be with small capacity one and load allot you may find you under 11,5v as the voltage ripple is very small and under load the voltage drops drastically. not to mention the f,,, weight you need to carry, which is 4-5 time more for same capacity against li-ion .
but you are all know guy , you probably know all that .