Thank you @stefano.gunella for answering .
the contacts seems ok but could be the reason the that i use not the original Battery.
i have destroyed old Battery but i can try to repair the original battery.
in the laptop come the 8 V but i do not measore the 3.3V i only measure 8V from Battery.
i also measure 800 Ohm on the 3.3 V line is this normal?
Thank you very much for Tipps on my you tube chanel christian Reber i will in future to show ease trick for opening.
i had a good Tipp for you i use heating Pad 80 grad an little light oil for glue opening. Also some platic so it is not so difficult open surface