GEM Battery Battery Gel Battery 2V 400ah Rechargeable Batteries for Telecom Rechargeable-SMF-VRLA-Battery/Long-Life-Deep-Cycle - China Solar Battery, Deep Cycle Battery | Made-in-China.com
AGM battery MW 12-12 12V 12Ah Standard. Battery lifetime is 6-9 years
electrical:12v:deep_cycle_battery [RV and vandwellers wiki]