36V 48Ah Extended Range Lithium LiFePO4 Battery

Battery Great. Battery App working better after starting glitches

Rating: 5 out of 5 stars

The battery is working great. It runs longer than I expected with my NT300 so I will likely have more than enough capacity for all the things I would like to do with my RIB. Mostly, this is for shore access in a boat that I can lift on and off of the beach. The battery app, however, had problems and would show all 0s for everything after selecting the battery to connect to. It would take many tries or many killings and restart of the app to get it to work on a Samsung phone. A new download of the app is better and with limited tests, seems to connect within about 8 second. So, note that there can be a bit of a delay. I find it very useful to see the BMS state of charge to know how many Ahrs are left to use as a gas tank (coulomb tank). Also note that, a password is needed to see the detailed information. Jack the AI didn't know what it was, but I was able to talk with a human to get it. All the cells in the battery are balanced to less than 1 mv so that's a good start for the new battery and this will allow me to better see the problem if there should be any battery issues in the future.

Performance

5 out of 5 (1 = Poor, 3 = Average, 5 = Excellent)

Environment

Saltwater

Reviewed by Clark W. on September 12, 2026

Verified buyer

Recommends this product

Great purchase!!!!

Rating: 5 out of 5 stars

Bought in in a bundle with the charger at a great price. Can't beat the price I paid. Looking forward to using it.

Performance

5 out of 5 (1 = Poor, 3 = Average, 5 = Excellent)

Environment

Freshwater

Reviewed by Stephen L. on September 10, 2026

Verified buyer

Recommends this product

Great battery

Rating: 5 out of 5 stars

Lots of power and the bluetooth capabilities makes it easy to monitor battery state.

Performance

5 out of 5 (1 = Poor, 3 = Average, 5 = Excellent)

Environment

Freshwater

Reviewed by Paul R. on August 13, 2026

Verified buyer

Recommends this product

Works like a champ...

Rating: 5 out of 5 stars

Works like a champ

Performance

5 out of 5 (1 = Poor, 3 = Average, 5 = Excellent)

Environment

Freshwater

Reviewed by Richard L. on July 27, 2026

Verified buyer

Recommends this product

Newport battery is an excellent upgrade for any kayak setup.

Rating: 5 out of 5 stars

I recently used a Newport lithium battery to power my kayak’s trolling motor and the experience was excellent. The biggest advantage is its lightweight design. Compared to traditional lead-acid batteries, the lithium battery was much easier to carry, install, and transport to and from the water.

The battery provided consistent power throughout the day without any noticeable drop in performance. Even after several hours of use, there was plenty of charge remaining. The fast charging time was another major benefit, allowing me to get back on the water quickly.

Performance

5 out of 5 (1 = Poor, 3 = Average, 5 = Excellent)

Environment

Both

Reviewed by Vu L. on June 5, 2026

Verified buyer

Recommends this product

Battery Performs great!

Rating: 4 out of 5 stars

Battery Performs as intend 10/10. However Costumer Support is less than desirable. I almost made a costly mistake based on the advertised dimensions of the battery. Luckily my intuition led me to trust but verify. Things seem to align after install.

Performance

4 out of 5 (1 = Poor, 3 = Average, 5 = Excellent)

Environment

Freshwater

Reviewed by Gaberial F. on May 19, 2026

Verified buyer

Recommends this product

Response from Newport: Glad to hear the battery has been performing well and that everything lined up after installation. We appreciate the feedback on the listed dimensions as well, as we’re always looking for ways to improve the customer experience. Thanks for sharing your experience!

EXCEEDS EXPECTATIONS

Rating: 5 out of 5 stars

I have this battery paired with the NK 300 on the back of a tactical pro 128 by Wilderness systems. This battery is great and exceeds my expectations for the capacity of how long this battery actually last covering so much water on a big heavy Kayak, certainly the Best 36 V batteries out there!

Performance

5 out of 5 (1 = Poor, 3 = Average, 5 = Excellent)

Environment

Freshwater

Reviewed by cheyenne S. on February 22, 2026

Recommends this product

Response from Newport: That’s awesome to hear! Pairing it with the NK300 on a Tactical Pro 128 is a serious setup. We’re glad the capacity and range have exceeded your expectations. Thanks for the feedback!

Perfect fit for the 12.5 Titan X Propel.

Rating: 5 out of 5 stars

Fits perfectly in the battery compartment of the 12.5 Titan X Propel. Bluetooth connectivity works well and provides real time data on the status of the battery.

Performance

5 out of 5 (1 = Poor, 3 = Average, 5 = Excellent)

Environment

Freshwater

Reviewed by Brandon V. on December 13, 2025

Verified buyer

Recommends this product

Response from Newport: We appreciate your feedback and are happy the battery is working well for you!

36 volt/40 amp battery review

Rating: 5 out of 5 stars

Battery is paired with NK300 motor installed on Titan X 12.5 kayak. I am able to cover lots of ground only using about 50% battery life even though I am usually run at 90-95% of maximum power. I am very pleased with the battery performance

Performance

5 out of 5 (1 = Poor, 3 = Average, 5 = Excellent)

Environment

Saltwater

Reviewed by Ricardo C. on September 25, 2025

Verified buyer

Recommends this product

Response from Newport: We love hearing you're happy with your battery, and even more that you've paired it with an NK300! Thank you for letting us know about your experience.

Performs great ! ...

Rating: 5 out of 5 stars

Performs great ! Appreciate all your support. Great company!

Performance

5 out of 5 (1 = Poor, 3 = Average, 5 = Excellent)

Environment

Freshwater

Reviewed by Edward A. on September 9, 2025

Verified buyer

Recommends this product

Response from Newport: We appreciate your feedback and are happy you had a great experience with our team.

Customer Service For The Win…

Rating: 5 out of 5 stars

Customer service was great and could talk to a real person who would help keep me informed through the warranty process

Reviewed by Rudy Y. on July 31, 2025

Verified buyer

Recommends this product

They will take care of you

Rating: 5 out of 5 stars

Been a great experience from sales all the way to Romel himself. Always provided excellent service.

Reviewed by Mike M. on August 10, 2024

Verified buyer

Battery Boss!

Rating: 5 out of 5 stars

This battery is great. I get over 6 hours of runtime at 55% throttle.

Reviewed by Lou M. on August 9, 2024

Verified buyer

Warranty

Rating: 5 out of 5 stars

Excellent. I tried the steps requested and when the battery would not wake up they warrantied it and sent meA new one.

Reviewed by John M. on August 8, 2024

Verified buyer

Newport Vessels stand behind their products!

Rating: 5 out of 5 stars

Great! The replacement battery for my initial 36V 40AH LiFePO4 worked great on today's fishing trip. I covered about 6 miles, typically running the motor between 75 and 100% power. I had power to spare when I completed my trip. NV definitely stands behind their products!

Reviewed by Michael L. on July 1, 2024

Verified buyer

Nice to see how fully they back their products

Rating: 5 out of 5 stars

I recently bought a NT300 and chose the 40AH battery to go with it. The initial battery I got was dead and after a simple, quick chat with the customer service team (Matt S, Gary and Kayleen) I went through the warranty claim process and not long after I was sent a new battery. After charging it up I tested it in the garage hooked up to the motor and all things are good. Just waiting to get out on the water now. Although it was disappointing to be delayed in using my motor, it is more than made up in knowing that NV stands behind its products and at every step of the way I was kept informed of what to expect and the associated timeframe.

Reviewed by Andrew P. on May 14, 2024

Verified buyer

36V 40AH Outstanding Battery

Rating: 5 out of 5 stars

Paired this with the NK300. I have used it for 3 days so far (1 practice day and 2 tournament days). The lowest the battery got was 84%. It took less than an hour to bring it back up to 100% with the included charger each of those days. Love that it comes with the charger. The app allows you to keep track of the charge while you fish. Great product and highly recommend!

Reviewed by Charles R. on May 9, 2024

Verified buyer

So light

Rating: 5 out of 5 stars

It blows my mind how lightweight these batteries are! Very compact as well so you will be able to squeeze it in areas on the kayak that will be out of the way while you’re fishing.

Reviewed by Brad H. on May 1, 2024

Battery

Rating: 5 out of 5 stars

Great was out all day used 35% of battery.

Reviewed by Kenneth C. on April 11, 2024

Verified buyer

Amazing!!

Rating: 5 out of 5 stars

Ready for the long trips on the water!!

Reviewed by Andrew E. on March 8, 2024

Verified buyer