Engineered for 100–120 lb trolling motors, this 36V 50Ah LiFePO4 battery delivers stable output and 1920Wh of energy for long fishing trips. It is the ideal choice for anglers who want dependable power, cleaner installation and all-day confidence on the water.
Built with EV-grade LiFePO4 cells, the battery combines long cycle life, smart Bluetooth monitoring, BMS protection and IP65 waterproof performance in one compact marine power solution. It is designed to help deliver safer, smarter and more reliable performance for modern trolling motor setups.
With a charging temperature range of 0 – 60℃ and a discharging range of -20 – 65℃, the battery is ready for both cold mornings and warmer fishing conditions. The smart protection system helps support battery safety and stable operation across a wide range of environments.
Connect the battery to the WattCycle App via Bluetooth and view battery level, voltage, temperature and status in real time. This smart monitoring function gives users better control over their power usage and helps make trip planning easier and more precise. With password protection, the battery is protected from unauthorised operations.
Compared with traditional lead-acid battery setups, this 36V 50Ah LiFePO4 battery offers higher usable energy, much lower weight and longer cycle life. It helps reduce maintenance hassle while improving portability, efficiency and overall boating convenience.
At only 13.55kg, this battery is more than 50% lighter than equivalent lead-acid setups, yet still delivers 1920Wh of energy. It gives anglers the power they need without adding unnecessary weight to the boat.
Recharge the battery with a compatible 36V LiFePO4 battery charger, a properly matched solar setup, or a suitable DC-DC charging solution. The battery uses a 43.8 ± 0.48V charge voltage, supports up to 50A max. continuous charging, and has a recommended charging current of 10A for everyday use.
Beyond trolling motors, this 36V battery can support a wider range of marine and mobile power applications where a compatible 36V power source is required. It is well suited to users looking for one compact lithium battery for fishing boats, marine electronics and broader portable energy use.
In addition to marine use, the battery can fit a variety of other portable energy scenarios such as camping, campervan applications and off-grid support where a compatible 36V system is needed. Its combination of compact size, lightweight design and long cycle life makes it a versatile energy solution for users who want more than a single-purpose battery.
| Battery Technology | LiFePO4 |
| Dimensions | L333 x W176 x H221 mm |
| Weight | 13,55 kg |
| Terminals | M8 Bolts |
| Casing Material | ABS |
| Waterproof Rating | IP65 |
| Self-heating | No |
| Hazard class | 9 |
| Warranty | 5+2 Years |
| Certifications | IEC, CE-EMC, CE-RoHS, CE-Battery, FCC-SDOC, UN38.3 |
| Nominal Voltage | 38,4V |
| Nominal/Usable Capacity | 50Ah |
| Energy | 1920Wh |
| Cell Balancing | No, passive balancing |
| Monthly Self Discharge | ≤3%/Month |
| Series & Parallel Configurations | Max. 4 in Parallel |
| BMS | 50A |
| Max. Continuous Output Power | 1920W |
| Overall Over-Charge Detection Voltage | 43,8±0,48V |
| Overall Over-Discharge Detection Voltage | 30±0,48V |
| Standard Continuous Charge Current | 10A (0.2C) |
| Max. Continuous Charge/Discharge Current | 50A (1C) |
| Over-current Charge Protection | 60A±5A |
| Over-current Discharge Protection | 60A±5A |
| BMS High Temperature Cut-Off | Charge: 55℃±5℃ Discharge: 65℃±5℃ |
| BMS Low Temperature Cut-Off | Charge: 0℃±5℃ Discharge: - 20℃±5℃ |
| High Temperature Recovery | Charge: 50℃±5℃ Discharge: 60℃±5℃ |
| Low Temperature Recovery | Charge: 2℃±5℃ Discharge: -15℃±5℃ |
| Charging Temperature | 0℃-55℃ |
| Discharging Temperature | -20℃-60℃ |
| Storage Temperature | 0℃-45℃ |
Very easy to assemble and utilize. Thanks for another great product.
Very satisfied with this baterry! I am using two of them in my 24V little offgrid solar system, without any problem. I purchased first battery about year ago, and second one just few weeks ago. Great value for the money.
Got this WattLINK cable to connect my Ecoflow Delta 2 Max to an External 2.5 kw server rack battery and after a firmware update on the Delta 2 Max it works very well. There is a slight discrepency of charge rates (3-5% SOC difference), where the Ecoflow will charge before the external battery and the solar input reads 0 as if charging has stopped, but the server rack battery continues to charge (likely equalizing from the Ecoflow) and when it draws enough power from the D2M, the solar charging kicks back on again, maintaining the state of charge. I'll be posting a video on this awesome upgrade on my Youtube channel (http://www.youtube.com/@backtotheadk883) soon.
I bought this to upgrade from a 100ah lithium battery in my travel trailer. It more than tripled my capacity and easily fits in the factory camco double battery box with no modifications required. The price was great and I highly recommend this.
This is my second “dumb” 314Ah Mini. I was able to squeeze two of them into my 2016 Winnebago View 24G coach battery compartment with just a slight modification (removed 4 small sections of aluminum that make up the battery “box” and cut two small slits in the top in order to bend up the lip a bit). I use them to both feed the coach 12V system as well as to provide backup power to an EcoFlow Delta Pro that I use as storage/inverter/solar controller. These 3 units provide 11.6kW of storage in a compact and flexible arrangement. When boondocking I power my whole rig (30A) by connecting the shore power cable the Delta Pro and use its battery for the 110V system and the WattCycles for the 12V system. If my Delta Pro starts to run low, I can move power from the WattCycle batteries to the DeltaPro by using the EcoFlow 800W alternator charger. All of this is kept charged from the alternator using a Victron Orion XS 1400 50A DC-DC charger. Solar panels are next!
We received two 314ah batteries that had the tops popped open. Partially charged and appeared as new. Took a gamble and charged them at 50 amps with no issue. They appear as new, and I just used a marine battery strap to tie down the lid in case we ever need to do maintenance. Wrote to company and they responded with all the answers I needed. A great way to get twice the AH batteries for the same cost as 1 retail unit. Very happy with purchase and the company.
I wanted a deep cycle battery as a back up that could be attached to either my Dakota Lithium multi box or my Ancor power station. This battery not only vastly improves both but outshines them with its built in Bluetooth and great charge retention. It’s also built so per strong so I don’t need a separate case to carry it in.
I’m very happy with this purchase.
Will Prowes led me to this manufacturer and I am glad he did. After years of frustration with another manufacturer, I have a battery with plenty of capacity and the ability to see that the charging equipment I have is doing its job and how the loads in my camper draw down the stored charge.
I wanted the 314AH battery WattCycle offered and that was out of stock for a while. I entered my email and they notified me when it was available, then delivered it promptly following my order, with a promotional discount. It just fit in my camper's battery box and I followed instructions on WattCycle's web site to set up my Victron charging equipment. I am just two weeks out camping and everything is working as it should. Thanks WattCycle!
I have purchased four of these batteries and well, please with them. I have a lot of people look at my project and they love the way this Battery look and ask me How did I find this batteries and I told them I will be ordering six more of this batteries for another project that I’m working on, and I would like to take out time to thank watt cycle for their support and helping me with my project.
Works as described. Very good customer service... I ordered the eco flow adapter cable at the same time.
The battery speed a day later and arrived in very secure packaging. The adapter shipped a little later, but the responsive customer service team was able to get it shipped out quickly so I could get my battery connected to my Delta 2 and test it out. I highly recommend this to anyone with an Eco Flow Delta looking to excitable their power storage.
I replaced two FLA batteries on my sailboat with this. 1/3 the weight, 50% more usable energy, 10x the life and zero maintenance. The Bluetooth works great, but I thought the app needs a little work; it’s not intuitive what the buttons do…. Needs some online instructions. The on/off button on the battery is a great feature.
My Custom Offgrid Solar Designs Victron system is working great with my 4 WattCycle 314ah batteries. I had SOK 314ah batteries and could never get the cells to balance properly so I decided to try these and so far I have been impressed. The cell balancing is excellent! Customer support was good as well. Thanks [****]
Everything is working perfectly under high load and the tested capasity was as promised.
I just received my first Wattcycle 48 volt 100 AH battery. I am using it to power my Starlink set up and charging it with two 400 wat solar panels supplemented with AC power when the Ecoflow Delta 2 internal battery runs low. The system usually lasts about half way through the night on the internal battery. Now the system runs through the night with power to spare. Just ordered the 2nd battery. Looking forward to an adapter for the Delta pro 3 next
Long lasting power to play on the water all day.
I bought two of these to put in my RV. Just started testing them prior to installing them. I charged them both to 100%. I used a 2000W Xantrex inverter running a small electric heater for the load and a Victron shunt to measure the battery. The average current is about 120A dc when running the test. I set the inverter to shutdown at 11V so this is higher than the 10V normally used for capacity testing. Battery 1 showed 654Ah, battery 2 delivered 651Ah. I repeated the test a second time and got similar results. The battery case is steel so it seems rugged. I could barely lift the battery and I wish the handles were wider. I like that the terminals are on the end of the battery which works well for my installation.
It arrived quickly, although I haven't used it yet, the voltage is fine, I was able to charge it. I don't know exactly what secondhand means, but it looks new from the outside. I have previously bought 2pcs 24v/100Ah batteries from them and have been using them with satisfaction for my solar system for about a year. That's why I dared to buy a battery for my small boat here.
Wattcycle is the first company to hear a need and fulfill it. I've seen him change their shipping of seeing them change their way their terminals are set up their power switch and such a short period of time so this doesn't surprise me I got one of these cables and it works perfect. Keep up the good work guys.
