A quality 100Ah lead-acid battery costs between $200-300. Quality lithium RV batteries cost between $700 and $1,000 each for a 100Ah battery. The first major difference you will notice between lithium and lead-acid RV batteries is the cost. Things to Consider Lithium vs Lead Acid RV Batteries Pro-tip: Terms like “12 volt”, “deep cycle”, and “marine” are used for both lithium and lead-acid batteries, so they do not help you determine which type of battery you are looking at. If you are going with lead-acid batteries, choose AGM. While AGM batteries are slightly more expensive than the other two, flooded batteries require consistent maintenance and gel batteries have low discharge/recharge rates. AGM batteries are now the most popular lead-acid RV batteries. “AGM” includes batteries labeled “lead acid”, “flooded”, and “gel”. Lithium ion batteries, on the other hand, are typically used in cell phones and electric cars because they are lighter and charge faster. Almost all lithium RV batteries are LiFePO4, because this chemistry is very safe and LiFePO4 batteries have a very long life. “Lithium” includes LiFePO4 (or lithium iron phosphate) and lithium ion. In reality, there are 2 major categories: lithium and AGM. A quick search for RV batteries will lead you to believe that there are many different types to choose from.
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