Digital cameras draw quite a bit of power.
With NiMH batteries, any digital camera should get over 100 photos per charge.
Alkaline batteries will not last near as long as one charge of the NiMH batteries.
It is possible that your NiMH batteries are defective.
I have had to replace a set of NiMH for one of my cameras.
NiMH batteries come in different power capacities.
The last ones I bought are rated at 2000mAh capacity.
The time you spend with the camera connected to the computer to download photos can really eat into battery time. You can spend more battery life downloading photos than taking the photos. I purchased a card reader and don't connect the camera to the computer any more.
I have a (discontinued) Kodak Easyshare CX4200 and from the beginning, rechargable NiMH batteries have lasted only 10 shots before the low battery warning comes up and 20-30 shots before it completely dies. Now looking at CNET's reviews, even cameras with "terrible" battery lives can live up to at least 100-200 shots.
Even with regular disposable AA batteries, I can't get more than 30 shots.
Does anyone know the possible problem?