Uncover the ultimate battery showdown! We analyze discharge rates of top brands like Duracell and RailVac in a head-to-head comparison. See the leaderboard and discover which battery reigns supreme in our 200 milliamp test! #BatteryTest #BatteryLife #Duracell #RailVac #TechReview #BatteryPower #EnergyComparison #Leaderboard #ProductReview #Gadgets