WASHINGTON (WUSA) -- People love that super-fast 4G service, but there may be one drawback.
The Wall Street Journal reports that some smartphone users are discovering their speedy service also kills their phones' battery life.
The main culprit is spotty 4G service. Even in big cities, the phones are searching constantly for a signal, which drains power.
The Journal reports that complaints about battery life could slow the push by wireless carriers to convert customers to 4G.