A boatowner discusses electrical storage products with a battery dealer. Twenty years ago my husband and I were inside a Florida Sam’s Club buying deep-cycle lead acid batteries for our Peterson 44. That same year the Maxi-cat Playstation set a transatlantic speed record with a lithium battery on board. It started a trend in boating. In the years since then, how have lithium batteries done in the boating marketplace? At the 2021 US Sailboat Show in Annapolis I asked vendors whether they sold more lithium than lead acid batteries. Custom Marine Products’ Tom Trimmer said at the last pre-pandemic boat…