Diode for 14.8V 4S LiPo

I’ve been given a 14.8V 4S 5Ah LiPo pack to try with my FT-857 and wondered what others are using to drop the voltage down to a sensible level?

I occasionally run the full 100W on the 857 so need something that can cope with the current draw.

Is this the right kind of thing I should be looking at?

http://cpc.farnell.com/stmicroelectronics/stth6012w/diode-ultrafast-60a-1200v/dp/SC11403

Matt
M0LMK