The batteries in my Forester were unmarked as well with the exception of a sticker on the top that said “NC-24”. Previous posts on the subject suggested that they were made by Exide. My batteries were not sealed.
I am coming from a Lance 835 Truck Camper that used one Lifeline 27 AGM battery that lasted us for 10 years. It was also outfitted with one 70Watt solar panel.
In the ten years that we owned the Lance we “plugged-in” maybe a total of five times as we mostly dry camped from very early spring to very late fall every year. This configuration was quite exercised so to speak.
I replaced the original batteries in our Forester with two Lifeline GPL-27T
Batteries, which according to their specs will give me a total of 200 Amp Hours at the 20 Hour Rate. I am in the process of adding 400Watts of Solar Panels as well. The Lifelines are AGM’s and are sealed, virtually maintenance free. I would buy them again if that helps.