Sony 2500 mAh AA Rechargeable Nimh Batteries, 4-pack

These are my first rechargeable batteries, so all I can say is that in comparison to alkaline, these are WAY better and longer losting. Alkalines stop working in digital cameras long before they are actually used up, because they can't supply the required current for high-demand devices. These Sonys last much more than 4x as long because alkalines only work for a few minutes. These Sonys maintain their voltage at a stable level. I am using them in an Olympus C-755 digital camera, and I charge them using the Sony BCG-34HE4 charger. I can't say exactly how many pictures you can take on one charge, because they last for so long I lose track. If you have a digital camera, you absolutely must use rechargeable Nimh batteries. Don't waste your money on the expensive "high-end" alkalines or non-rechargeable lithium, etc. Also, you are doing the environment a favor by not using toxic landfill filler.