The FPV-POWER 17.5Ah battery suits kayak fisherman who run larger fishfinders/GPS which typically draw more than 1A. If drawing 1A, you can expect around 17 hours of use but you may need a voltage regulator as some fishfinders need a minimum of 11V to run.
Capacity: 17500 mAh
Amp Draw: 7A Max
Cycles: 4200 @ 1A discharge 90% DoD
Case: Waterproof hard case IP67 (waterproof only when lead is connected)
Battery Management System: Built-in short circuit and over current protection with charging and discharging safety cutoff.
Charger: 2A wall charger