If you want long lasting, storage, and lifetime where cost and size doesn't matter then look at AGM batteries. They're great since if they (probably) wont freez

If you want long lasting, storage, and lifetime where cost and size doesn't matter then look at AGM batteries. They're great since if they (probably) wont freeze and shouldn't mind falling over. I've seen some of these batteries in person. They are huge, heavy, and expensive buy I've seen many of these last for years and years and years. Many hams use them to power their car radios. One distributor of these AGM batteries is this site I found with a bit of google magic: https://www.batterystuff.com/batteries/rv-marine/agm/ https://www.batterystuff.com/batteries/rv-marine/agm/