What are RV Lithium Batteries? Simply put, RV Lithium Batteries are rechargeable 12-volt batteries that have become a popular replacement for lead-acid batteries. This is particularly true of folks who have solar power on their rigs. RV lithium batteries are based on a newer, more efficient lithium-ion technology known as LiFePO4 or lithium iron phosphate. For the purposes of this post, whenever we talk about “lithium” we’re referring to this specific technology. http://www.combinetech.cn/industrial-vehicle-battery/lithium-electric-forklift-battery/