Android Question Communicating with remote server

hi
I'am making an anti theft app.
the app must always contact my http server to get commands

I was using httpsultis and a timer ,each 3 mins to do http get and check my site for commamds.

but this method is so battery consuming on some phones it took about 25% of the battery

any other methods that is less batter hungry ? with keeping a 3 minutes refresh rate

all ideas are welcomed