Comment Motorola flip phone with a REAL battery (Score 1) 210
I had gotten a couple of small 6-volt jell cells from work (a UPS that had been in a plane crash), then I got a dead cell phone battery from the repair shop. I ripped the battery pack apart and put in a small voltage controller then ran the voltage controller to the jell cells. The whole contraption fit quite nicely into a fluke multimeter case.
Now I had a portable cell phone with 3days of standby PLUS 8 hours of talk time
Telus at the time had 'unlimited talk time' contracts, knowing that battery life would be the limiting factor -- but not for me! I regularly went over 1500 minutes, and Telus eventually changed 'unlimited' to '1000 minutes' after I taught my hack to a couple of other hardware types.