If you're wondering if you can hook your fish finder directly to the battery, the answer is yes! There are a few things to keep in mind when doing this, though. First, make sure that your battery is fully charged. You don't want to run the risk of running out of power while you're out on the water. Second, be aware of what kind of voltage your fish finder uses. Most use 12 volt batteries, but some may use 24 volt batteries. Make sure you know which one yours uses before hooking it up to the battery. Finally, be sure to use proper wiring when connecting your fish finder to the battery. This will help ensure that everything stays safe and secure while you're using it.