I got a skull! Thank you so much it motivates me even more to get this going!

I havent even mentioned my motivation I work outside in big fields sometimes doing different things but im usually on a tractor or trimming palm trees and not around or not able to hear other people. I usually wear headphones that block sound to reduce ear damage. I also work in rain and tremendous florida heat and usually both in the same day lol. So I want a mp3 player that can withstand harsh conditions without questions and last a long time with the preference of holding all my songs and keeping track of what I like. Thats where this need is born from and I cant find anything that meets all those nicely.

I am about to start upgrading my first player from the old b to the new model a+ and found this video of running the a+ off 8 double a batteries for 44hours and those were rechargeable so not the same capacity as non rechargeable. I would like to get 16-20hrs from 4 double a and a internal battery that way it at least lasts 2 full days.

I AM LOOKING FOR A WATERPROOF SLIDER SWITCH FOR LOCKING THE BUTTONS IF YOU KNOW WHERE I CAN FIND ONE PLEASE LET ME KNOW! THANKS