Yi Z221 FW 1.5.6 RAW Timelapse Problems

[Ultrazauberer]

Hello,

I have a little trouble to make a RAW timelapse with my YI and FW 1.5.6. I want to make a daylight RAW timelapse with an intervall of 10...30 seconds.

This script I am using (modified myself):

autoexec.ash:

#RAWLAPSE v2 by nutsey
#Howto: Put this file into root of SD
#Steady fix your Yi
#Turn on, camera will start timelapse shooting loop 
#capturing RAW+JPEG sets with 8s exposure and 8s interval at ISO 100
#Remove/rename the script to disable it
sleep 7
#SET ISO TO 100
t ia2 -ae exp 100 0 0
#SET JPEG QUALITY TO 80
writeb 0xC0BC205B 0x50
#t ia2 -ae still_shutter 1
sleep 1
#RAW+JPG
t app test debug_dump 14
sleep 1
#MAIN LOOP thanx VOTerra
while true
do
t app key shutter
#10sec sleeping: sleep 10
sleep 30
done

goprawn.conf:

#YiMAX-PRO script custom settings file by nutsey
system.tuning_mode IMG_MODE_VIDEO
cfa_noise_filter.enable 0
demosaic.activity_thresh 10
demosaic.activity_difference_thresh 8
demosaic.grad_clip_thresh 2048
demosaic.grad_noise_thresh 4
sharpening_fir.fir_strength 0
spatial_filter.mode 0
chroma_filt.enable 0

The problem I have: The camera is turning off after some minutes. The battery is full and I'm using an additional USB battery as a external power source. Someone have a clue? I had to make my last timelapse with my Git2 because the camera is more stable at timelapse operation but I like more the image quality of the Yi (and my modified non-fisheye lens).