Will my battery be ok if i have 2 amps?

hey guys i got a 500 watt rockford 2 channel amp working my subs. and now i want to upgrade my speakers with an amp. i got aftermarket kenwood front speakers and jbl 6 x 9's and on i cud get a deal on a 4 channel rockford amp. so i was wondering if i could put that other amp in and my battery be fine. my lights dont even dim much barely at all to be exact you have to focus to c the dim. but if i add that (400 watt 4 channel) will it kill my battery with both?