Northstar also makes the X2 batteries at Batteries Plus
I just bought this battery:
Duracell Ultra Platinum 31 after rebates and coupons and taxes and core charges it worked out to $240. its also american made, made by East Penn-Deka.
I purchased a NOCO GenM1 on-board charger for it. The regular NOCO chargers charged at too high of a voltage, but the on-board chargers are 14.4V which is within spec. I have the install and operations manual from East Penn for this battery if anyone wants it. I spoke with East Penn and they recommended Clore Automotive; i contacted Clore because their website didn't show technical specs for their chargers and they just replied "check the website." I contacted NOCO, they reviewed the O&M manual and said the GenM1 would work well.
I bought this tray because it was amazon prime and i can have it tomorrow:
https://www.amazon.com/gp/product/B002ZMKJWU/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1 none of the local auto parts stores had a 13" metal tray and the basic $10 trays online wouldn't be here to next week.