Battery discharging when Restrotone 2 off

[wackko]

Hello,
I have a weird issue : I haven't used my Retrostone 2 for 4/5 days (fully charged - 100%). And when I started it after that, it was only 15% battery remaining ?
I noticed it 2 times now :
1- First time : 7/8 days : 0% remaining : couldn't play, had to wait for charge...
2- second time (today) : 4/5 days, 15% remaining...

Is it normal ?

Should I remove the battery each I'm not using the Retrostone ?

[Valden]

Make sure nothing is plugged in to the USB ports because the USB ports remain powered when the Retrostone 2 is off. So, obviously, anything left plugged in will drain the battery.

[wackko]

Ok thx for the reply !
Yes : I've got a usb wifi dongle that stays all the time in place (as internal wifi introduces lag in games)...
I'll try to remove it next time

[Admin]

Also make sure to turn off the system and not just putting it to sleep.