If you’re running forward-facing sonar, one of the biggest questions is: “How long will my battery actually last?”
And my honest answer is… It depends.
But not in a confusing way—once you understand what affects battery life, it becomes pretty simple to figure out what you need. Let's break it down!
Why Battery Life Matters More Than You Think
Forward-facing sonar isn’t like traditional electronics. You're running a graph, transducer, black box, and hopes everything will last all day long. You want your battery to be reliable so you can focus on catching as many fish you can or whatever your goal is out of your forward facing sonar. The goal is simple: You shouldn’t have to think about your battery at all after you install it.
What Actually Affects Battery Life
There are a few key factors that determine how long your battery will last.
- Screen size- Bigger screens draw more power. A 12” unit will use significantly more than a 9”.
- Brightness + settings- Running high brightness and aggressive settings will drain faster.
- Conditions- Cold weather can impact performance, especially with lower-quality batteries.
- How you fish- Are you scanning constantly? Moving spot to spot? Fishing all day? It all adds up.
Instead of overcomplicating things, here’s a simple way to think about it.
20Ah Batteries
Best for smaller setups such as the 7-9" screens. It’s lightweight and easy to carry, but it does have limits.
32Ah Batteries
This is the sweet spot for most anglers. It gives you reliable, all-day power for standard forward-facing sonar setups—especially in the 9”–10” range. If you don’t want to think about your battery during a normal day of fishing, this is where most people land.
52Ah Batteries
Built for longer days and bigger setups. If you’re running larger screens 10-12" plus, fishing hard all day, or just want maximum runtime, this gives you that extra cushion. It’s more battery than most people need—but exactly what some people want.
The biggest mistake we see? People underestimate how much battery they need.
They try to get by with the smallest or cheapest option… and end up:
- Cutting trips short
- Managing power all day
- Upgrading down the road anyway
A simple rule that works for most people:
👉 If you’re unsure, go one size up. No one regrets having more battery.
When your battery is sized right, you'll worry less about your battery percentage throughout the day, turning down brightness to save power even when you need extra brightness from the sun, and praying your battery will make it to the end of your trip.
We wanted:
- Consistent voltage output
- Real-world runtime
- Reliable performance in all fishing conditions
Build out your shuttle or forward facing sonar with purpose. You want to be able to install the battery & forget about it!
