Why turns my MacBook off after I installed a new battery?

Hi,

i installed a new battery (ordered from ifixit) and installed it into my macbook.

All done without failure. Battery runs, coconut battery says "Load Cycles:0, Manufacturer: SMP, Battery: Good".

I did SMC and PRAM-Reset. And i loaded my battery to 100%.

But the problem is that there comes no "battery warning" before macbook goes in hibernate mode. And hibernate mode also is not working, the macbook turns off hisself between 7% and 9% of battery charge.

The system clock is set false after a new reboot with power cable.

What can i do? Original Battery has about 1100 load cycles, but always warned me that macbook will go into hibernate mode, and it worked...

Any ideas?

Thank you!