Battery Life Iaudio7

[Hendrikw]

Hello

I sent A Email to Cowon but I have no answer from Cowon
Maybe can One of you help me out
My English is not so well so I copy and paste the mail down under

I thought I had a problem whit my Battery life { Iaudio I 7 }
Its runs less then 13 hours whit the headphones delivered whit the package
When I changes the Headphone it runs more than 50 Hours

My Question

I want to buy a new headphone
Which one runs also the 50 hours
Is that a ohm problem or a mWatt or something els
I search the hole www and i can´t find any solution for my problem
When I buy A Sennheisser A Creative or A Sony
Give this Brand the same problem ?
Which Brand don´t ?

I bought the best Player there is , whit A 60 hours batterylife
Which Brand give a guarantee whit a full 50 or 60 batterylife

Greetz Hendrik
from Holland