Thanks for all of the answer ,
I am looking on the go with iem like the Sony ex 1000 and maybe some cans like the Custom One Pro/M100. The HD 650 , maybe LCD 2 later at home
Since this is a secondhand item I am expecting the battery to be around 6 hour, but from what I tried the battery seems to drop like rock , is the battery drains relatively stable ?
I think Ibasso charges $20 for a new battery and $6 for a spare charger to keep at your desk