I've been running three Power Queen 12V 100Ah LiFePO4 batteries in series on my Minn-Kota 36V trolling motor for a full year now, and I can give you an honest assessment of how they hold up in real saltwater fishing conditions — not just out of the box.
The Setup
Three Power Queen 12V 100Ah Group 31 LiFePO4 batteries wired in series to produce 36V for a Minn-Kota trolling motor. This is a common configuration for serious anglers who want to ditch heavy lead-acid batteries without sacrificing runtime. Each battery is rated at 100Ah with a 100A BMS, 1280W max output, and built-in low-temperature cut-off protection.
What I Was Looking For
My previous setup used three AGM batteries. They worked, but the combined weight was brutal — close to 200 lbs. I wanted to cut weight, extend runtime, and stop replacing batteries every two to three seasons. LiFePO4 was the obvious direction. The question was whether Power Queen could deliver at their price point.
Performance After One Year
Runtime: Noticeably better than my old AGMs. On a full charge, I'm consistently getting full-day runtime at moderate speeds without anxiety about making it back to the dock. LiFePO4 chemistry delivers usable capacity all the way down to near-zero, unlike AGM which starts losing performance well before it's fully discharged.
Weight savings: Each Power Queen battery weighs around 22 lbs — roughly half the weight of a comparable AGM. Three batteries in the bow is a meaningful difference in how the boat handles and planes out.
Bluetooth monitoring: The built-in Bluetooth lets you check state of charge, voltage, current, and temperature from your phone. It's genuinely useful on the water — no more guessing how much juice you have left mid-day.
BMS performance: The 100A BMS has handled everything I've thrown at it. No nuisance trips, no issues running the motor at high thrust. The low-temperature cut-off hasn't triggered in my conditions (Florida), but it's good insurance for anglers fishing in colder climates.
Charging: You need a LiFePO4-compatible charger — don't use a standard lead-acid charger. I'm using a dedicated lithium charger and they've charged consistently and quickly throughout the year.
What I'd Watch For
Series wiring matters: When running three batteries in series for 36V, make sure your wiring, connectors, and fusing are rated for the application. Lithium batteries can deliver high current quickly — that's a feature, but it means your wiring needs to be up to spec.
Charger compatibility: Budget for a proper LiFePO4 charger if you don't already have one. It's not optional.
Cold weather: The low-temp cut-off protection is a real feature — LiFePO4 batteries shouldn't be charged below freezing. For Florida fishing this is rarely an issue, but worth knowing if you travel north.
One Year Verdict
After a full year of regular use, the Power Queen batteries have performed exactly as advertised. No capacity loss I can detect, no BMS issues, no surprises. The weight savings alone made the switch worthwhile, and the runtime improvement over AGM is real and noticeable.
At their price point, Power Queen delivers serious value for anglers who want to make the jump to lithium without paying premium brand prices. If you're running a Minn-Kota or MotorGuide 36V setup and still on lead-acid, this is a legitimate upgrade worth considering.
Rating: 4.5/5
Browse our marine electronics and power collection, including the Litime 12V 100Ah LiFePO4 trolling motor battery — a similar lithium option we carry in store.