Yes you are correct Optima's are AGM, sorry. One post states I would need a 3 stage convertor if I used an Optima, but I can put it in my TV without any modifications? Another states that because of its spiral design it is 40% less efficient than an old fashion lead acid battery, but group the optima is about 40% the size of a conventional battery for the same amperage? Lead acid batteries require maintenance, adding distilled water, not to much but do not let it go dry, require venting because of gas discharge etc. No I will take my chances with the optima's. They are an excel ant battery, will last as long or longer than a lead acid, with out the maintenance, will not spill, does not require venting, and will provide the same AH in a smaller space! Yes there are batteries that will provide more AH, i.e. golf cart batteries, and if I were going to be dry camping I would consider adding them with a solar charging system, but I do not now plan on any dry camping. Thank you all for your opinions.