Batteries and Power

[yumook]

Hi,

I have a Protege M400-ST4001 and need a replacement AC Adapter.  The AC Adapter that came with the computer has the description of:  PA3283U-5ACA 75W Global AC Adapter-Standard, 75W, 15V 5A.  I ordered one online but got sent PA3469U-1ACA (also 75W, 15V 5A) instead. 

Is it safe to use the new adapter or should I return it? 

Many thanks for your help,

Yum Ook