MOBILE phone batteries run flat faster in the country than the city.
Technicians say blackspots and increasing data demands drains them faster.
Mobile phones in the country work overtime to find a signal but it is the built-in transmitter that drains the battery.
A Telstra spokesman said all mobile phones varied the power at which they transmitted.
"When a phone is a long way from a cell tower it has to transmit at a higher level," the spokesman said.
"This is the same as two people trying to talk to each other.
"You only need to whisper in someone's ear but you have to shout across a footy field.
"A phone and cell tower operate in basically the same manner - the further away from a tower your transmitter is, the more power it is pulling from the battery."
Glen Forbes beef farmer David Blum said he bought a new battery after he thought the original was faulty.
"It didn't make any difference, I have been told all phones have the same problem," Mr Blum said. "They are working harder because the signal is either weak or non-existent."