I think a good battery choice is the Deka ETX15. I've been using that battery for a couple years now and it's holding up.
That battery is sold under a few different names, all with the same part number. Duralast (Autozone), Big Crank, and Deka, all are the exact same US made battery.
http://www.federalbatteries.com.au/ETX15/ made by this company http://www.eastpennmanufacturing.com/
https://www.autozone.com/miscellaneo...ery/350078_0_0
https://www.batterymart.com/p-Big-Cr...5-Battery.html
The same Ah rating as the stock Yuasa YB14A-A2, but 30 CCA more. It's also AGM, which handle vibrations better. It does weight a few pounds more than the stock battery. The terminals are much more robust than the Yuasa.
My next choice would be a lithium type battery, but they're nearly double the cost. They save a lot of weight though and don't discharge as rapidly when stored. I've been using one on a motorcycle of mine for years, again, they're expensive and I'm not able to put them on everything because of the price.
The story of three wheels and a man...