Hey thanks for your feedback
I going with following battery from EM3ev
Battery: 52V (14S5P) EM3ev Jumbo Shark Options - 52V 14.3Ah (14S5P-PF) Shark
Charger: 58.8V 5A Charger (with 90/100% Switch)
Cells to Pick From
Panasonic PF: 50.4V nominal, 14.3Ah, ~718Whrs.
Samsung 30Q: 50.4V...