Tell me a bit more about rechargeable batteries, how are they different from primary or throwaway batteries? Why should I buy NiMH rechargeable batteries? What are the primary advantages of NiMH batteries over Alkaline or other rechargeable batteries?
How environmentally friendly are NiMH rechargeable batteries? How long can a rechargeable battery last over its life? The advantage of rechargeable batteries is that they can be recharged and reused up to a thousand times and generally they greatly outperform standard everyday throwaway leading brand batteries. The fact that rechargeable batteries can be used again and again represents a massive saving over their useful life.
Rechargeable NiMH batteries are also very popular simply due to the fact that they are extremely environmentally friendly.
Once charged, these rechargeable batteries can be used in the same way as you would with your previously throwaway batteries of the same size. Better performance in driving electronics and huge money saving are the two major reasons to buy NiMH Nickel metal Hydride rechargeable batteries.
They can be charged up to times and last longer than alkaline or NiCd batteries. One set of relatively inexpensive NiMH rechargeable batteries can save you from buying thousands if throwaway alkaline batteries.
The mAh capacity rating refers to the storage capacity available for a particular battery. The manufacturer codes are listed in the table above.
At a slow discharge rate the Duracell pulls out ahead slightly, both for the voltage and the amp hours. I don't have the patience to run it at lower amp rates, but for very low discharge applications you might find that the Coppertop excels the Radio Shack even more. Evidently the Radio Shack cell was designed for high current and the Coppertop is designed for low current.
I was surprised at how this cell shines for high current applications. The green and red curves were the same cell run twice at 2 amps. Evidently for high current applications the rechargeable battery is a much better choice, both for amp hours and for keeping the voltage high during discharge. I still use the disposable because of the convenience, but both for total cost and number of pictures between battery change-out there is a good reason to use these rechargeable cells.
Full charging usually taking at least 14 hours. Special ni-cad cells can tolerate charging rates approaching the amp-hour rating but special chargers that cut back the charging current when the battery becomes warm are required. Lead-acid cells have a nominal voltage of 2 volts and may be charged at a high rate, typically above the amp-hour rate. The charger may be a simple current-limited voltage source supplying 2.
Battery Capacity.
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