Get a genuine replacement or back-up adapter for your Eluktro Pro laptop.  This adapter is compatible with the following Eluktronics models:

N151RD, N170RD, N151RF, N170RF, PRO15NRD, PRO17NRD, N550RC, N850HJ, N850HK1, N857HK1, N870HJ & N870HK1.  Be prepared with the right connection and power supply!