The document describes early phones as being very large, about the size of a brick and weighing almost two kilos. The speaker recalls one early phone weighing almost two kilos and being the size of a brick. These early phones also had very poor battery life, with the battery lasting between only 10 to 20 minutes before needing to be recharged.

1. INVENTIONS AND INVENTORS abigail shambrook '. "It was huge,'' recalls Cooper, who was in Sydney this week to address a communications conference. "The phone weighed almost two kilos - it was about the size of a brick.'' If that sounds prehistoric, so too was the phone's power efficiency. "The battery lasted somewhere between 10 and 20 minutes.