will the r603ff work on 2s lipo??? just picked up some high voltage servos and would like to get the most out of them.

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you're out of luck mate. i know someone has tried with the 604fs and it worked. also heard some had failed with it. either way the 603 and 604 are not rated for 2s lipo. you want to get the 614ff to work with 2s lipo