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Battery capacity
Battery capacity ratings
mAh is the measure of the total capacity of a battery. Capacity refers to how much charge a battery holds after it is fully charged. The higher the number (eg. 1000 mAh, 2,300 mAh, 2,500 mAh) the longer a battery will last.
These ratings are only applicable when comparing the same types of batteries (NiMH to NiMH, not NiMH to Alkaline). NiCad and NiMH batteries are generally recommended for use for high-drain electronic gadgets such a digital cameras. For slow-draining devices, high rated alkaline batteries are better at providing their full capacity.
Digital camera rechargeable batteries
In theory, the higher the battery rating, the more photos you can take on a single charge. In practice, many factors come into play as to the number of photos you can actually take before batteries are depleted. The number can also vary depending on the power-consuming features you use such as the built-in camera flash, LCD monitor and zoom lens.
