It’s also worth noting that lead acid batteries will hit their voltage cutoff point/what the amp sees as full discharge, at 50% of charge, while lithium batteries will run down to 20% before hitting that voltage. This gives them a large effective boost in runtime (the 12v/8ah sealed lead acid has 4ah available for use, the 12v/10ah lithium has 8ah available, so double the real world runtime).
Couple that with much lighter weight and far better storage stability, cycle capacity and shelf life, at least in most of our usage, lithium is an obvious better choice.
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