12V 200Ah LiFePO4 Lithium Battery Deep Cycle Rechargeable Battery with Built-in 100A BMS, Up to 5000 Life Cycles, Perfect for RV, Marine, Scooters, Power Wheels, Trolling Motor

I have purchased 2 each - 300 AH batteries that worked great for 1 year. On a camping trip my second battery alarm started going off for low voltage while running my inverter. I knew it was the battery fault because switching to my backup battery had everything working fine. Getting home I contacted Digi Marker (Jessica) and she walked me through the required testing and information parameters. I get it, those are needed because some people may not have the proper setup and or damaged the battery due their own fault. Conclusive test results had Digi Marker stand behind their product and FedEx shipped me a replacement batter immediately.So many other brands claim warranty service and do not deliver. Digi Marker has USA support and delivers on their warranty with very responsive customer service.I am sold on their product because of the 20 years in business and development, several certifications and most of all their customer service and support while validating product warranties.

Battery arrived packaged well and about half charged. I fully discharged and charged back up. A full discharge test produced nearly 104 Ah, so above the 100 Ah advertised! My only disappointment was that this battery didn't have low temp charge protection but I knew that going in. All in all, a good product and value!

Here's a unpacking video. It's new to me, so am update will follow in time. I gave 5 stars because everything good so far.

I used this product with a small (36lb Thrust) trolling motor. The battery failed at the start of the 4th use and has not worked since. I have attempted multiple times to resolve this with Digi Marker through Amazon. They (Digi-Marker) refuse to respond to multiple messages and as of this writing have refused to replace this product. If you want to throw away $300 go ahead and get it; but I suggest you look anywhere but here.

I bought 2 of these 8Ah 12V (nominal) batteries for $25 each in Dec 2022 for various ham radio projects. I see the price has almost doubled since then to $46. Upon arrival, I charged them at 1.0A to 14.40V, then discharged them with a capacity tester down to 10.5V. One gave 8.0 Ah, the other 8.1. I recharged them shortly after the test and ran another discharge test 8 days later. That outcome was 8.1 Ah on both batteries. I concluded that they do not have substantial short-term self-discharge or capacity loss.The manual says that the batteries have a heating film that activates during cold charge. But a seller's answer to a question here says that this version doesn't. The manual lists many different battery sizes and doesn't say which one has the low-temperature charging feature. Hey, at least there's a manual, it's in English, and it's actually readable! It even has a clever acknowledgement of the "MADE IN CHINA" brand's poor reputation, with optimism that their high-quality battery will help mitigate the brand problem.The battery came with a cable with fuseholder and 3 40A car-type fuses. Neither the product description nor the manual mentions this. 40A is not appropriate for this battery, but the wires are fat enough that maybe the fuse is just there to protect the cable. I have no clue what the cable's large connector is for. I'll just chop it off and install my preferred connector. And I'll put a 20A fuse in the holder. It's a handy accessory.

great value

Well, they lasted almost 2 years. One battery is fine the other only puts out 9 volts.

I got this battery to use to power a trolling motor on a small boat I keep on my dock. It's probably the smallest AH battery I can use for something like this. I charged the battery up with a small charger I got to make sure it was fully charged before starting, that took about 2-3 hours.I set up my trolling motor on the boat with the motor in some water and ran the motor on the lowest setting and measured the current on the low setting as 6 amps. To test out the battery I let it run continuously for over 2 hours and it was still running when cut it off. Battery voltage did not fall off significantly and the battery did not get warm from the current draw. It should have had a bit more juice left, but I did not want to push it. This experiment proved to me that I can use this little battery to run the motor for at least two hours on low which will be plenty for just putting around the creek. I plan to use it along with a PWM control in a small box as a lightweight power source for the boat and motor. It should do fine for that from what I have seen so far.