Ofcourse! it was a Adaptec 5805ZQ ink BBU. New from eBay, really cheap!
Other spec of the pc:
Fractal design chassi ("mini tower")
Corsair 500w psu modular
Z87 gigabyte m-atx
i5 Haswell 3,2ghz
16 (2x8) GB RAM
Adaptec 5805ZQ
Samsung 840 120GB SSD (sys)
6x4 Seagate 4TB 5900rpm RAID5
5,25 to 4x hot swap 2,5" in front (dont know what to put in yet.. probably 2xSSD RAID0 and one hdd for sys backup + something else )
Noctua CPU cooler, 5x120mm and 1x140mm (actually very quite)