LiTime 36V 50Ah Trolling Motor LiFePO4 Battery review

? Are we ready to find out whether the Litime 36V 50Ah Trolling Motor Bluetooth 5.0 Low-Temp Protection LiFePO4 Battery with 43.8V 25A Charger, Buit in 50A BMS, Deep Cycle Group31 Lithium Battery Perfect for Trolling Motors, Marine is the right option for our boats, trolling motors, and off-grid setups?

Product Overview

We like to start by stating what this battery promises and why it matters. The LiTime 36V 50Ah trolling motor battery is built from automotive-grade LiFePO4 cells and is designed specifically for trolling motors and marine use. It includes Bluetooth 5.0 monitoring, a 50A built-in BMS, and ships with a 43.8V 25A charger to speed up charging while offering IP65 protection.

We also want to point out that LiTime claims ABYC and ASA membership, which suggests their design and manufacturing processes aim to meet marine standards. That membership combined with the use of LiFePO4 chemistry gives us longer cycle life, lower self-discharge, and better thermal stability compared with lead-acid alternatives.

Key Specifications

We find that a clear specification table helps us quickly understand capabilities and limits. Below is a condensed view of the most important numbers and features for reference.

We like that this table consolidates what we need for quick decision-making. It helps us match the battery to our use cases more efficiently.

Build Quality and Design

We appreciate batteries that feel thoughtfully engineered, and this one shows several design choices that aim to benefit marine users. The case and terminal layout are tuned for group31-like installations, and the use of automotive-grade cells implies better consistency between cells and tighter quality control during manufacturing.

We also notice features that matter on boats: attention to humidity and salt spray tolerance, IP65-rated charger, and a built-in BMS to protect the pack from common abuse modes. While the battery isn’t waterproof by itself, the materials and protections make it robust for marine environments when mounted correctly and sheltered from direct water exposure.

Packaging and Shipping

We always consider how batteries arrive because damage in transit can be an issue. LiTime notifies us that shipments may come in a single overweight package or multiple packages; they advise patience if packages arrive separately. That suggests careful packing, but we still recommend inspecting the battery and charger on arrival for any signs of physical damage.

We also like that heavier shipments are consolidated for protection. When we open the package, we expect clear labeling, solid foam or corrugated protection, and secure terminals to prevent shorting during transit.

Performance on the Water

We prioritize actual on-water performance over marketing claims. For trolling motor use, this battery is rated for motors up to 120 lb thrust, which covers a wide range of electric outboards used for fishing and slow cruising. The 50Ah capacity gives plenty of runtime for many anglers and small-boat applications when managed properly.

We also note the BMS-limited discharge: the continuous 50A max and a 60A window for 30 minutes. That means for many trolling motor setups that draw moderate current, we will get sustained, reliable power. For deliverable runtime estimates, the exact motor draw, prop load, and speed matter. We recommend we measure the real draw of our motor under typical conditions to estimate run time accurately.

Real-World Runtime Example

We like concrete examples to put numbers into perspective. If our trolling motor draws 30A at throttle, then a 50Ah battery would theoretically provide around 1.6 hours (50Ah / 30A ≈ 1.67 hours). With the BMS and usable energy slightly conservative (we might use 90-95% of capacity on LiFePO4 for longevity), we should expect roughly 1.5–1.6 hours of continuous 30A draw. For 20A draw, that runtime extends toward 2.4 hours.

We should always assume real-world conditions — currents, wind, and prop inefficiency — will reduce these numbers, but compared with lead-acid batteries we’ll likely enjoy more usable capacity and lighter weight.

Charging and Charger Details

We find the included 43.8V 25A charger to be a strong selling point because it matches the pack voltage and supports fast charging while offering marine-capable IP65 protection. The charger’s 25A output is significant for a 50Ah pack; in ideal conditions it can charge the battery from a very low state to near full in roughly 2–3 hours depending on acceptance rates and charging profile.

We like that the charger provides LED status indicators so we can monitor state of charge and faults without needing the app. The IP65 rating also gives us some confidence when charging near wet environments, provided we keep the charger connections and battery terminals dry.

Charging Times and Best Practices

We prefer conservative charging routines to maximize battery life. With a 25A charger and a 50Ah battery, the theoretical minimum charge time from empty to full is roughly two hours (50Ah / 25A = 2 hours), but due to CV tapering and BMS safety, practical full-charge times are often more like 2.5–3 hours. If we top up frequently rather than deep-cycling, we maintain the battery health better.

We also recommend charging in a ventilated, dry location, monitoring the battery temperature, and avoiding charging if the ambient temperature is below the recommended low-temp limit. The BMS includes low-temp protection, which prevents charging at dangerously low temperatures, but proactive caution is still wise.

Bluetooth 5.0 Features and App

We appreciate modern batteries that give us visibility without extra hardware, and the Bluetooth 5.0 integration on this LiTime pack does just that. The Bluetooth features include auto-connection, smart discharging control, real-time monitoring of state-of-charge, battery health, and the ability to turn the battery on/off via the app.

We find auto-connection particularly convenient because it removes a step for frequent monitoring, while the real-time metrics offer reassurance about remaining runtime and BMS events. The app also helps when we’re troubleshooting or balancing parallel packs, because we can check cell voltages and error states without hooking up diagnostic tools.

Usability and Limitations of the App

We like apps that are intuitive and reliable; based on our experience with similar LiFePO4 systems, they usually offer basic telemetry and some configuration options. We recommend checking periodic firmware updates through the app, keeping both the charger and battery firmware current, and confirming the app works with our mobile device before heading out on critical trips.

We should be aware that Bluetooth range is limited relative to Wi-Fi, so remote monitoring from a distance offshore won’t be possible. For dockside or on-boat use, though, Bluetooth is more than adequate.

Safety Features and BMS

We are always impressed when a battery includes a robust BMS, and the LiTime’s 50A BMS is central to safe operation. It offers protection against over-current, short circuits, over-voltage, under-voltage, and temperature extremes. Those protections help prevent dangerous events and prolong cell life by preventing abuse.

We also like that the pack supports a 60A continuous discharge for up to 30 minutes, which covers occasional surges. The low-temperature protection is especially relevant for marine users who might operate in early spring or late fall water temperatures, as LiFePO4 cells are vulnerable to charging at very low temperatures.

Environmental Durability

We prioritize batteries that can handle boat environments. The BMS is specified to cope with high humidity and salt spray, and the pack’s connectors and case materials reflect marine use concerns. Still, we recommend mounting the battery in a dry, ventilated compartment and using corrosion-resistant terminal hardware and marine-grade cabling to extend service life.

Energy Density and Comparison

We like to compare energy densities because they directly affect weight and space efficiency. LiTime quotes an energy density of 57.93 Wh/lb based on 1920 Wh and a weight of roughly 33.14 lb. That’s about a 10.85% higher energy density compared with a typical 12V 100Ah LiFePO4 trolling motor battery listed at 52.26 Wh/lb in our comparison.

Below we present a compact comparison table to make that clearer.

*Typical 12V 100Ah weight is example-based and varies by model.

This increased energy density means we carry more usable energy per pound with the LiTime pack, which helps us extend run time or reduce the number of batteries needed for a given energy requirement.

Practical Implications of Energy Density

In practical terms, higher energy density translates to less weight for the same runtime or more runtime for the same weight. For small boats where weight and space are at a premium, that 10% edge can matter when we want to avoid trimming or impeding performance.

We should keep in mind that mounting location and center of gravity considerations matter; a single heavier pack positioned strategically can be better than multiple smaller packs scattered about.

Capacity Expansion and Parallel Use

We like modular systems that allow scaling. The LiTime 36V 50Ah supports up to four batteries in parallel, enabling us to expand total capacity while keeping voltage consistent at 36V. That means a single battery gives us about 1.92 kWh; two in parallel doubles that to 3.84 kWh, and four yields up to 7.68 kWh total.

We recommend matching battery age, state-of-charge, and firmware version if we parallel multiple units. The built-in BMS manages balancing and current sharing, but consistent packages reduce the chance of imbalance and increase overall reliability.

Wiring and Safety When Paralleling

When we wire batteries in parallel, we must use equal-length bus bars and cables to ensure even current distribution. We also prefer to add fusing or circuit protection that is rated appropriately for the combined pack current. Finally, we recommend monitoring each pack individually (using Bluetooth) to catch any imbalance or a failing pack before it impacts the whole system.

Installation and Mounting Tips

We care about safe and practical installation. The LiTime pack is designed with a Group31-like footprint, which helps us fit it in many trolling motor battery compartments. Because it weighs about 33 lb, it’s manageable for one person to lift but still benefits from two-person handling to avoid dropping or damaging the case and terminals.

We like to secure batteries with a padded strap or hold-down bracket, ensure terminal covers are used during installation, and use marine-rated terminals and cable lugs. Proper cable sizing based on the max current (50–60A) is important to minimize voltage drop and heat generation.

Terminal Care and Corrosion Prevention

Saltwater environments are hard on terminals and connectors. We always use dielectric grease on terminals, choose tinned marine cables where possible, and inspect connections periodically. If we notice any sign of corrosion, we will clean and re-torque terminals immediately and consider adding additional protective measures like sealed terminal boots.

Use Cases and Suitability

We find this battery suits a range of applications. It is ideal for trolling motors up to 120 lb thrust, onboard energy storage for small boats, and even land-based applications like off-grid solar systems and backup power for sensitive electronics. Because it is not a starter battery, we should not use it for cranking engines, but it excels at deep-cycle duties.

We also see it fitting well into hybrid systems where multiple 36V packs are used to support longer trips or where space dictates using a higher voltage pack rather than multiple 12V units. For anglers, kayak conversions with proper mounting and access, or small pontoon and bass boats, this pack often hits the sweet spot between capacity and weight.

Not Recommended For

We should avoid using this battery as an engine starter or in systems that demand very high instantaneous cranking currents. We should also avoid charging at sub-zero temperatures and avoid exposure to direct spray without proper enclosure.

Maintenance and Lifespan

We like batteries that require minimal maintenance and give predictable lifespan. LiFePO4 chemistry delivers on both counts: low self-discharge, minimal maintenance, and a long cycle life often quoted as 4000+ cycles. In practical usage, this often translates to many years of service if we keep the battery within recommended temperature ranges and avoid chronic over-discharge.

We recommend we keep the battery at partial charge between uses rather than storing it discharged, top up after long trips, and avoid storing it at extremes of temperature. Regular Bluetooth checks help us track state-of-health and cell balance over time.

End-of-Life and Recycling

When the time comes to retire the pack, we encourage responsible recycling. LiFePO4 cells should be returned to a certified battery recycler or manufacturer take-back program where available. We should never dispose of the battery in regular trash, and we will follow local regulations for battery disposal.

Pros and Cons

We find listing pros and cons helps us and others compare options quickly. Below are the key advantages and disadvantages we see after hands-on use and specification review.

Pros:

• Strong energy density (≈57.93 Wh/lb) relative to comparable LiFePO4 packs.
• Built-in 50A BMS with multiple protections for safe operation.
• Bluetooth 5.0 for real-time monitoring and convenient control.
• Includes a 43.8V 25A IP65-rated charger for fast and weather-resistant charging.
• Supports up to 4 batteries in parallel for expansion to ~7.68 kWh.
• Long cycle life (4000+ cycles) and low self-discharge.
• Designed with marine considerations (humidity and salt spray protections).

Cons:

• Not suitable for engine starting duties — only for deep-cycle use.
• Requires attention to mounting and waterproofing on small boats (battery itself is not fully waterproof).
• Bluetooth has limited range; no remote (cloud) monitoring for offshore use.
• Shipping note: may arrive in a single heavy package — may catch some buyers off-guard.
• For high-power trolling motor bursts beyond 60A sustained, this pack can be limiting.

Who Should Buy This Battery?

We recommend this battery for anglers and boaters who need a reliable, relatively lightweight, and expandable 36V power source for trolling motors up to 120 lb thrust. It’s also a strong pick for small marine energy storage, off-grid solar setups where 36V is desired, and anyone who values app-based monitoring and fast charging.

We would advise against choosing it if we need a starter battery for an outboard engine or if our motor requires sustained currents well beyond the 50–60A window, unless we plan to combine multiple packs in parallel with appropriate wiring and protection.

Buying Considerations

When we shop for this battery, we will verify physical fit in our battery compartment, confirm that our trolling motor’s amperage draw matches the BMS limits, and plan for how we will charge — whether shore power with the included charger, or via onboard alternator/inverter systems (which would need suitable DC-DC or charge-control hardware).

Alternatives to Consider

We usually like to weigh other options against a product to be sure the choice fits our needs. Consider these alternatives conceptually:

• Multiple 12V LiFePO4 batteries wired in series to reach 36V: These can be useful if we already own 12V packs or prefer staggered replacement.
• Higher-discharge LiFePO4 packs if our motor needs more than 60A bursts: Specialized high-power packs might be heavier and more expensive but provide higher instantaneous current.
• Traditional AGM/lead-acid deep-cycle batteries if budget constraints are tight: They’re cheaper up-front but heavier, have shorter cycle life, and need more maintenance.

We recommend comparing real-world weight, usable capacity, and lifecycle cost instead of just purchase price when evaluating alternatives.

Frequently Asked Questions (FAQ)

We find a short FAQ helps clarify common concerns quickly. Below are the questions we see most often, along with concise answers.

Q: Can we start a gas outboard with this battery? A: No. This battery is designed for deep-cycle trolling motor use and energy storage, not engine starting. Use a dedicated starter battery if you need cranking capabilities.

Q: How many batteries can we parallel? A: Up to four batteries in parallel are supported, allowing expansion to roughly 7.68 kWh at 36V. Always match firmware and state-of-charge when paralleling.

Q: Is the battery waterproof? A: The battery itself is not fully waterproof. It is built to withstand humidity and salt spray in typical marine environments, but it should be installed in a dry, ventilated compartment away from direct water exposure.

Q: Can we charge below freezing? A: The BMS includes low-temperature protection and will typically prevent charging below recommended temperatures. We should avoid charging in sub-zero conditions to protect the cells.

Q: How long does the charger take to charge the battery? A: With the included 43.8V 25A charger, practical full-charge times are often 2.5–3 hours from a low state, thanks to tapering and BMS management.

Q: What should we do if the battery arrives in a single heavy package? A: The listing notes that due to overweight constraints, shipments may consolidate into a single package for protection. Inspect packaging and the battery on arrival and contact the seller if there is damage.

Final Verdict

We find the LiTime 36V 50Ah trolling motor battery to be a compelling option for many boaters and small-boat anglers. It combines solid energy density, robust safety features via a 50A BMS, Bluetooth 5.0 monitoring for convenience, and a fast 43.8V 25A charger that suits busy boaters. The ability to scale up to four batteries in parallel makes it flexible for longer trips or off-grid energy needs.

We recommend this pack for those who want a reliable, modern LiFePO4 solution that balances capacity, weight, and portability without requiring specialized installation. As long as our motor amperage aligns with the 50A continuous (60A short-burst) rating and we follow recommended mounting and charging practices, this battery should serve our needs for years.

If we need higher sustained discharge for very large motors, or a dedicated starter function, we should consider alternate or supplementary battery solutions. Otherwise, for trolling motors up to 120 lb thrust and general marine energy storage, this LiTime battery delivers a strong mix of performance and convenience that we would feel confident using.

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