I've had it for a short time and and impressed so far. I have not used it for on my trolling motor, which is one of the main reasons thatt I bought it for, but have done a multitude of tests. Came with about 70% charged in a well packaged sturdy box. Discharged to about 10% and then re-charged to 100%. It recharged to about 5AH over the rated battery amount.I hooked up a 500w power inverter to it and ran multiple 115vac items and it performed well. I ended up running the battery down to about 50% and let it sit for a few days and the voltage remained steady. Recharged to 100% again and it has been sitting for about 3 weeks without any voltage drop.I also hooked up a power inverter and ran a 12vdc portable freezer/refrigerator with a compressor that was set at 5F. The amp draw varied during the frig running due to the compressor kicking on and off. Checked the temperature of the frig/freezer many times and it ran flawlessly. After 23.5 hours the battery was at 17% and I turned everything off at that point. Recharged overnight and it recharged fully to 100% and 50AH.I cannot rate the longevity as it is pretty new. I am a looking forward to using it with my 30lb thrust trolling motor. I highly recommend the DJLBERMPW 12V 50Ah Lithium Battery.UPDATE TO REVIEW 9/14/24I have the battery installed in an enclosed ammo box that also has a PWM installed in the same box and the PWM puts off quite a bit of heat. The faster that I run my trolling motor the more heat that the PWM puts out.I ran the trolling at various speeds of 30% to 100% power without any problems and took the battery down to between 50% and 30% on those days without any problems. Then one day we wanted to get back to our dock in a hurry. At that point the battery was at around 75% and we ran the trolling motor wide open to get back. After running the motor at 100% speed for about 45 minutes everything went dead.My conclusion is that the battery BMS had shut down the battery due to the excessive heat in the battery box. I arrived at that conclusion due to the fact the once we got back to the dock the battery worked fine after it was cooled down some. I verified that conclusion the following day by running at 100% trolling motor speed for over 1.5 hours with the lid to the ammo box propped open with a stick without any problems.1.) The BMS worked as it is supposed to and protected the battery. 2.) The shut down was not due to the battery being faulty. It was due to the battery working as it should.I have already ordered a 12v fan to install in the box and do not anticipate any other problems once thefan is installed. I recommend this battery 100%.