What does the mAh rating of my batteries mean?
The mAh rating refers to the storage capacity available for a particular battery. A battery with a capacity rating of 2400 mAh could deliver a current of 2400mA for one hour. Higher mAh ratings for the same battery type will generally mean longer run times. This does not apply when comparing different types of batteries. This means that you may not be able to predict how long your electronic device will run just by looking at the capacity rating. When powering high drain electronic devices like digital camera, an alkaline battery will only deliver a small fraction of its rated capacity. For example AA alkaline batteries typically have a capacity rating of over 2500 mAh and AA NiMH batteries have similar ratings of 1800 to 2700 mAh. But when it comes to actually powering an electronic device like a digital camera, the NiMH batteries will often run the device for three or four times as long. A NiMH or NiCd battery is likely to deliver much closer to its rated capacity when it is powering
