The 70W DC-DC Converter 12V 6A is a waterproof DC-DC converter. It converts 8-40V DC input to 12V@6A, which is ideal supply for embedded PCs and powering robots.
I have used this supply multiple times now over 2 years powering things like LED light strips and audio amplifiers. It is ideal for converting 2 - 12V lead acid batteries in series (24V) to get a fixed 12V output. I already have 4 of these supplies and will be buying more!