How's Olympus? There is no definitive answer...
How you use the camera affets battery life. For example; a flash picture can use more than 10 times the power that is used taking a picture without flash...
Best rechargable that I have found for use in a digital camera is the Eveready Rechargable Alkaline. These batteries last longer per charge than a standard alkaline. Unfortunately they are only good for about 50 charges. But they hold the charge for over a year if the camera is not being used.
Next best is the Ray-O-Vac "Hybrid" These are a Nickle Metal Hydride, but they hold thier charge better than average NiMh cells. I'mnot sure wht they do differntly... 30 charges so far and doing well on the set I am using. Not quite the capacity of the rechartgable alkalines though.
The problem with buying non-rechargable batteries is... you never know if you are getting a battery that is fully charged. I've bought a package of Duracels with a date saying they should have been good for 6 years more shelf life... and they had less capacity than a low end "dry cell" cheapie battery.
Rechargeables... if you care for them properly will save you a LOT of money vs Alkalines. Well since all digital cameras are designed to use rechargeable batteries I guess your question is moot.
The best battery for digital cameras are the Li-ion. | 