Just picked up 4 of these 6ah batteries off of amazon this week for $30/ea. Replacing the heavy motorcycle battery I carry on my sled for the lights/fans/phone charging. Wired up great and was $20/ea cheaper than the amped or Dakota. Just thought I would share.
There were great prices on bigger ones too, but they didnt have reviews, so I just walked the traveled path.
I havent gotten into lithium batteries much to date, so wiring these tiny light batteries felt fake the whole time, but I read great voltage and had less voltage droop when load was put on them as compared the the heavy agm that they replaced. What a game changer!