Hello everyone, I am looking for a second detector to use for freshwater beach and water hunting as my primary land detector is a minelab e-trac. I would be using it wading in no more than about six feet of water. The questions I have are how long the batteries last and if you use rechargeable batteries? Also how is the depth in fresh water sand? Also does anyone use the waterproof headphones and if so how is the sound? Like I stated earlier I would be using this almost exclusively for water detecting. Thanks all and HH.