Quote: "I HATE my Cannon digital camera - it doesn't have a rechargeable option, so you can only put batteries in, within 30 seconds, the camera is dead - it sits in my bottom drawer unable to be used as it dies as soon as you turn it on, even with brand new batteries."
It sounds like you were using normal AA batteries with your camera.
Digital cameras consume a lot of power to do all sort of things, from booting the circuit board, zooming the lens, flash lighting to displaying the giant LCD screen.
Traditional batteries like Ni-cad and Alkaline won't last on these beasts. You'll need high-powered rechargeables like Lithium Ion or Nikel Metal Hydride.
Canon offers two ranges of products: The lower spec (like the A-series) using the AA batteries and the expensive range (like G-series, Pro-1, Ixus and SLR) with Canon rechargeables.
The AA NiMH batteries are inexpensive nowadays (around $5 for one 2300mAh NiMH) and are available from most major supermarkets and electrical stores.