I have not heard of the Amped brand but Have a Dokotah Lithium I am pretty happy with. Has not had lots of use, have the 10 amp hour that along with ice fishing, I use as a backup for my electronics battery in my boat. Have had the big group 31’s fail and fishing flowages at night and backwaters on the Mississippi, it makes me feel good about getting back to the landing.
I expect the lithium batteries are like the lead acid ones, had problems with cabelas gel batteries then broke down and got an Odyssey, cost more money but it has outperformed the cheaper batteries not to mention saved lots of lost fishin time

fished on the far side of the little island by Shaefers, got 6, a fellow there before me got a bit more, then the crowd came at 2:30, can you imagine drilling a hole within 3 feet of another persons hole? Errrggg, one of the trials of fishing near a city.

am going out tomorrow for the first time, your posting sure added optomism to my trip, am thinking of heading around the island towards the landing lights. will post tomorrow.