Ive just bought a digital camera, a cheap one admittedly, but its going through batteries like water!?

i'VE ONLY HAD IT A WEEK, AND TAKEN ONLY AT MOST 10 PHOTOS, BUT I'M ON THE 3RD SET OF BATTERIES! BEFORE I TAKE IT BACK, IS IT SOMETHING I'M DOING WRONG, OR IS IT THE CAMERA? iTS ONLY A CHEAP THING i BOUGHT FOR PUTTING STUFF ON EBAY, BUT AT THIS RATE, ITS GOING TO PROVE VERY EXPENSIVE
Update: PS When I say going through batteries like water, I mean batteries are lasting 5 minutes at most!
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