Frequently Asked Questions
With the single battery pack, smaller Duffy electric boats will go for 3.5 hours, averaging just above 5 mph, for 17.5 miles (assuming calm winds and no current). Our larger Duffy electric boats can go slightly faster. Using the double battery pack, you can expect to double the time and distance plus an additional 15%.
The standard built-in charger will need 12 hours to charge the single battery pack fully, and it only requires approximately 7 hours to recharge to 75%. The twin battery packs will require double the time to charge.
The batteries we use as standard equipment have a life of over 800 cycles. Depending on how well you maintain it (keep charged and full of water), it can even last up to 1,200 times. The battery’s lifetime also depends on how far down you take charge on your typical outing or cruise, and discharging to 100% will severely cut your cycles by more than half. Conversely, if you don’t go below half charge on your normal run time, the batteries will cycle many times than advertised. Customers tell us they have had batteries for the last 10 years, but most replace theirs after about 5 or 6 years.
Duffy electric boats are primarily for harbors, bays, rivers, and small lakes, and our boats can handle winds up to 40 mph in protected waters. While not designed for use in heavy seas, the Duffy 22 completed a 100-mile trip in southern California seas around Catalina Island on April 19, 2013, in 25-knot winds.
Duffy Boat Batteries
L 10.4 W 7.1 L 10.9
20 Hour Rate: 232
Minutes of Discharge @ 75 Amps: 122
Minutes of Discharge @ 25 Amps: 474
Length: 10 1/4” (260mm)
Width: 7 1/8” (181mm)
Height: 11 1/4” (286mm)
205 AMPS 10HRS
L 10.24 W 7.09 H 9.92 WEIGHT 69.44